My periods got over on 5th nov and I had unprotected sex on 9th. He didn't ejaculate in me and he was not even deep inside. I took ipill on 10th within 6 hours. Got bleeding from 15-17th nov which I assume is because of the pill. Now it's 7th dec and I have not got my periods yet which came on 4th the last month. Is it a sign of pregnancy? What should I do?