Pregnancy Concerns: Lower Back Pain and Birth Control Effectiveness

Suspected pregnancy, lumbar issues?

I had my menstrual period on March 10 and had sexual intercourse that day.
I started taking oral contraceptives four days into my period.
On March 18, I began experiencing lower back pain (after prolonged sitting, standing, or lying down), which has continued until today, March 21.
I also experienced nausea once (I have a tendency to get motion sickness, but I rarely feel like vomiting after getting car sick).
Today, I had unprotected sexual intercourse.
What is the likelihood of pregnancy? Additionally, in the past week, I have been taking weight loss supplements, and I sometimes experience watery stools about 1-2 times a day; if I don’t eat, I don’t have bowel movements.
I have been taking the contraceptive pills while also using the weight loss supplements.
Could this affect the contraceptive effectiveness and lead to pregnancy?

Ning, 20~29 year old female. Ask Date: 2018/03/21

Dr. Huang Jianzhong reply Obstetrics and Gynecology

On March 10th, I had my menstrual period and also engaged in sexual intercourse that day.
I started taking oral contraceptives four days into my period.
On March 18th, I began experiencing lower back pain (after prolonged sitting, standing, or lying down), which has continued until today, March 21st.
I also experienced nausea once (I have a tendency to get motion sickness, but I rarely feel nauseous after getting car sick).
Today, I had unprotected sexual intercourse.
What is the likelihood of pregnancy?
Answer: The likelihood of pregnancy is low.
Additionally, in the past week, I have been taking weight loss supplements, and I sometimes experience loose stools about 1-2 times a day; if I don’t eat, I won’t have bowel movements.
I have been taking the contraceptive pills while also using the weight loss supplements.
Will this affect the contraceptive effectiveness and lead to pregnancy?
Answer: This will not affect the contraceptive effectiveness.

Reply Date: 2018/03/21

More Info

When it comes to concerns about pregnancy, particularly regarding lower back pain and the effectiveness of birth control, it's important to address each aspect carefully.

Firstly, regarding your lower back pain, it is not uncommon for individuals to experience discomfort in this area, especially if they have been sitting, standing, or lying down for extended periods. Pregnancy can exacerbate back pain due to hormonal changes, weight gain, and the shifting of the center of gravity. If you are experiencing persistent back pain, consider gentle stretching, maintaining good posture, and using supportive cushions when sitting. Additionally, prenatal yoga or physical therapy can be beneficial in alleviating discomfort. If the pain continues or worsens, consulting a healthcare professional is advisable to rule out any underlying issues.

As for the nausea and vomiting you mentioned, these symptoms can be attributed to various factors, including hormonal changes, stress, or even dietary changes. Since you have a history of motion sickness, it’s possible that your body is reacting to the stress of the situation or changes in your routine. If nausea persists, consider small, frequent meals, staying hydrated, and avoiding triggers that may worsen your symptoms. If the nausea becomes severe or is accompanied by other concerning symptoms, seeking medical advice is crucial.

Regarding your concerns about the effectiveness of oral contraceptives, it’s important to note that when taken correctly, birth control pills are highly effective in preventing pregnancy. However, certain factors can affect their efficacy. For instance, if you have been taking weight loss supplements, it’s essential to check if they contain ingredients that may interfere with the absorption of the contraceptive pill. Some herbal supplements and medications can reduce the effectiveness of birth control pills, leading to an increased risk of unintended pregnancy. Always consult with a healthcare provider before combining medications or supplements.

You mentioned having unprotected intercourse after starting the pill. If you began taking the pill on the first day of your period, you should be protected from pregnancy after seven consecutive days of taking the pill. However, if you started taking the pill later in your cycle, there may be a risk of pregnancy if you had unprotected sex before the pill had taken full effect. If you are concerned about the possibility of pregnancy, consider taking a home pregnancy test or consulting with your healthcare provider for further evaluation.

In summary, while lower back pain and nausea can be common during various life stages, it’s essential to monitor these symptoms and seek medical advice if they persist or worsen. Additionally, understanding the interaction between birth control pills and other supplements is crucial for maintaining their effectiveness. If you have any concerns about your health or the possibility of pregnancy, don’t hesitate to reach out to a healthcare professional for personalized guidance and support.

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