<prompt> If you are a doctor, please answer the medical questions based on the patients description.I had unprotected sex with my boyfriend and I am on birth control but I took the pill late that night by accident. My lower stomach hurts really bad kind of like a period and I m feeling tired and my back, legs, head, and breasts hurt. I had a clear mucus discharge the next morning . Is it possible that I am pregnant since I m on birth control but took it late that night?  <response>: Hello dairy understand your concernPregnancy is not possible as you are on the birth control pill. Birth control is very effective in preventing the pregnancy just 0.5 failure rate. Efficiency of pill dose nit affected by taking one pill at late night. Your symptoms could be due to hormonal imbalance, premenstrual symptoms. You can be symptomatic treatment for that:Take tablet metal spas, gentle breast massage with evening prime rose oil. Maintain proper pelvic hygiene, take proper rest, Chat Doctor. If period will not come in next 7-8 days then consult the gynecologist for proper examination. Hope this may help noncontact Chat Doctor for further health query Best regards 