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The chances of pregnancy cannot be ruled out with unprotected intercourse on day 5 of your menstrual cycle. You are closer to your ovulation day (egg release from ovary) after you finish your periods, hence chances of pregnancy cannot be ruled out completely. For a menstrual cycle of 28-30 days, fertile days would lie between day 8-16 taking day 1 as first day of bleeding. The timing of your intercourse is during your probable fertile period. Sperms once released inside you can stay alive for 3-4 days and egg once released from ovary can stay alive for 6-7 days). Wait and watch for your next periods. Look out for development of any new symptom suggestive of early pregnancy. If you do not get your periods, or if you develop any symptoms suggestive of early pregnancy, you should consider visiting your doctor/gynecologist for further evaluation/examination (to confirm pregnancy related changes/signs in body) and blood/serum HCG level test (to confirm/rule out pregnancy accurately). Drink plenty of water. Take adequate rest. Maintain healthy diet.
If pregnancy gets ruled out, and if you intend to remain sexually active, consider visiting your gynecologist to get started on suitable regular birth control measures to be protected (after you start with your periods). Be regular with birth control use as instructed. Avoid having unprotected sexual contact.
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