Pregnancy Risks After Unprotected and Protected Intercourse - Obstetrics and Gynecology

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When assessing the risk of pregnancy after both protected and unprotected intercourse, it is essential to consider several factors, including the timing of the menstrual cycle, the nature of the sexual activity, and the use of contraceptive methods.

In your case, your girlfriend's menstrual cycle runs from January 8 to January 11, with a typical cycle length of 28 to 32 days. This means her next expected period would likely start around February 5 to February 11. The timing of ovulation typically occurs about 14 days before the next expected period, which would place her ovulation around January 22 to January 26.
On January 15, you had unprotected intercourse, but you mentioned that penetration was brief and there was no ejaculation. While this significantly reduces the risk of pregnancy, it is important to note that pre-ejaculate fluid (pre-cum) can contain sperm, albeit in lower quantities. Therefore, while the risk is low, it is not entirely absent.

On January 18, you engaged in protected intercourse, which further reduces the risk of pregnancy, provided the condom was used correctly and did not break. Since there was no ejaculation during this encounter, the risk remains minimal.

The symptoms your girlfriend experienced from January 22 to January 24, including dizziness, nausea, and discomfort in the lower back and legs, could be attributed to various factors, including hormonal changes, stress, or even early signs of pregnancy. However, these symptoms are not definitive indicators of pregnancy, especially given the timing relative to her ovulation and the sexual encounters.

As of January 26, when her symptoms had mostly subsided, it is still too early to confirm or rule out pregnancy definitively. If her period does not arrive by the expected date in early February, it would be advisable for her to take a home pregnancy test for a more accurate assessment.
In terms of the likelihood of pregnancy, given the circumstances you described, the risk appears to be low, particularly due to the use of condoms and the timing of the unprotected intercourse relative to her ovulation. However, if there are any concerns or if her period is significantly delayed, consulting with a healthcare provider would be the best course of action. They can provide further guidance and conduct any necessary tests.

In conclusion, while the risk of pregnancy in your situation seems low, it is essential to remain vigilant and monitor for any changes. If there are any doubts or if symptoms persist, seeking medical advice is always a prudent step. Additionally, discussing contraceptive options with your partner can help prevent similar concerns in the future.