<prompt> If you are a doctor, please answer the medical questions based on the patients description.can pregnancy occur if I had unprotected sex on the date on which my periods was due and my partner did not ejaculate nor penetrate but there was just a contact.I had periods exactly a week after and it was heavy,dark and lasted 3 days as it always has.after my periods ended,I have been experiencing pain in my lower back,very slightly, sometimes stomach pain and my legs became weak.is it due to the stress n tension I am taking?and there is always some weird movement in my stomach which never happened before.I am very concerned, please help  <response>: Hi, I understand your query concern. Conception is possible only with an unprotected sex during fertile days 2-3 days before after ovulation. There is no question of ovulation in the days nearing menstruation . So you dont have risk of getting pregnant with the sexual activity under query. Digestive disturbances. weakness due to heavy periods psychological tension can cause your symptoms of backache, abdominal were movements of weakness in legs. Take rest, have healthy lifestyle including genital hygiene, have B complex calcium supplements, take light diet digestive enzymes. You would be alright in few days. Thanks. Thanks. 