Pregnancy Chances and Menstrual Irregularities After Unprotected Sex

Probability of Pregnancy

I had my last period on June 16, and on July 8, I had unprotected intercourse with my boyfriend, and he ejaculated inside me.
I did not take emergency contraception afterward.
Today, my period was supposed to arrive according to my app, but it hasn't come yet.
When I went to the bathroom, I noticed some blood when I wiped; the first time it was just a little, the second time there were two small spots, and then it stopped.
The blood was a bit dark red but also looked somewhat bright red.
What is the likelihood of pregnancy? When can I expect my period to arrive? Additionally, I seem to have some vaginal inflammation; could this indicate an infection or disease?

Niming, 10~19 year old female. Ask Date: 2018/07/14

Dr. Huang Jianzhong reply Obstetrics and Gynecology

Last month, my period started on June 16 and ended on the 20th.
I had unprotected intercourse with my boyfriend on July 8, and he ejaculated outside.
I did not take emergency contraception afterward.
Today, my period was supposed to arrive according to my app, but it hasn't come yet.
When I went to the bathroom, I noticed some blood when I wiped; the first time it was just a little, the second time there were two small spots, and then it stopped.
The blood was a bit dark red but also looked somewhat bright red.

1.
What is the likelihood of pregnancy? When is my period likely to arrive?
Answer: Since I had unprotected intercourse with ejaculation outside and did not take emergency contraception, there is a possibility of pregnancy.
2.
Recently, it seems like I have vaginal inflammation.
What could this indicate?
Answer: This may indicate vaginitis.

Reply Date: 2018/07/14

More Info

When it comes to understanding the chances of pregnancy and menstrual irregularities after unprotected sex, several factors need to be considered. Based on your description, you had unprotected intercourse on July 8, and your last menstrual period started on June 16. Given that your menstrual cycle is typically around 28 days, you would have been nearing the ovulation window during that time, which generally occurs about 14 days after the first day of your last period. This means that there is a possibility of pregnancy if you had unprotected sex during your fertile window.

The bleeding you experienced after using the restroom could be a sign of several things. It could be implantation bleeding, which occurs when a fertilized egg attaches to the lining of the uterus, typically around 6 to 12 days after conception. This type of bleeding is usually light and can be dark red or brown in color. However, it could also be a sign of your menstrual period beginning, especially since your period was expected around this time according to your tracking app.

Regarding the timing of your next period, if you are indeed pregnant, your period would not come as expected. If you are not pregnant, the bleeding you experienced could indicate that your period is starting, albeit irregularly. Menstrual irregularities can occur for various reasons, including stress, hormonal imbalances, or underlying health conditions.

As for the vaginal inflammation you mentioned, it is essential to consult with a healthcare provider for an accurate diagnosis. Vaginal inflammation can result from infections, such as bacterial vaginosis or yeast infections, or sexually transmitted infections (STIs). Symptoms may include itching, burning, unusual discharge, or discomfort during intercourse. If you suspect an infection, it is crucial to seek medical attention to receive appropriate treatment.

In summary, the chances of pregnancy after unprotected sex depend on the timing of ovulation and the nature of the bleeding you experienced. If you suspect you might be pregnant, taking a home pregnancy test after a missed period can provide clarity. Additionally, if you are experiencing any concerning symptoms, such as vaginal inflammation, it is advisable to consult a healthcare professional for further evaluation and management. Regular check-ups and open communication with your healthcare provider can help you maintain reproductive health and address any concerns you may have.

Similar Q&A

Understanding Pregnancy Chances After Unprotected Intercourse: Key Insights

Last month, my period was from April 6 to April 11. This month, I experienced menstrual cramps on May 7, but there was no bleeding. I started bleeding on May 9. On May 9, I had unprotected intercourse and felt a little ejaculation inside. Afterward, I washed with water. Is there ...

Dr. Wu Xianghui reply Obstetrics and Gynecology
1. For pregnancy concerns, please take a home pregnancy test or visit a gynecologist for examination and evaluation four weeks after your most recent sexual intercourse. 2. The menstrual cycle can be influenced by various psychological and physiological factors. If your period is...

Understanding Pregnancy Chances After Unprotected Intercourse

If my girlfriend's menstrual cycle started on February 18 and we had intercourse from February 21 to February 24 with ejaculation inside, what is the likelihood of pregnancy? How long after that can we test for pregnancy?

Dr. Lin Wenbin reply Obstetrics and Gynecology
Any unprotected sexual intercourse carries the risk of pregnancy. Ovulation bleeding in females can sometimes be mistaken for menstruation. The method of tracking safe periods has a very poor contraceptive effectiveness. It must be combined with other forms of contraception, such...

Understanding Pregnancy Chances After Unprotected Intercourse

Hello doctor, my girlfriend had her period starting on December 14, lasting for 7 days with a 28-day cycle. We had unprotected intercourse with ejaculation outside on the morning of December 17. She hasn't had her period for a week now and is feeling anxious and experiencing...

Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, the chances of pregnancy are low. It is recommended to use contraception during sexual intercourse. Wishing you good health.

Understanding Pregnancy Chances After Unprotected Intercourse: Key Insights

Hello doctor, I would like to ask about a situation that occurred two weeks ago. My girlfriend and I had unprotected intercourse for about 4-5 thrusts after she cleaned my genitalia. My girlfriend has irregular menstrual cycles, with her period coming around the 15th, 18th, 19th,...

Dr. Zhang Kunmin reply Obstetrics and Gynecology
Hello, the questioner: There is a possibility of pregnancy even if ejaculation has not occurred during intercourse, as pre-ejaculatory fluid may contain sperm. It is best to use emergency contraception as a remedy, but its effectiveness is not 100%, with a failure rate of about 3...