I had intercourse today. After he ejaculated, he remained inside for 2-3 minutes and was moving inside. I suddenly felt as if condom is slipping and he moved out to check. The Condom had slipped partially and I held it and removed the penis along with the Condom. Nothing seamed to leak outside the Condom. But I'm worried that something might have leaked from the edge of the walls of the Condom when it was inside. But we are not sure. I am on 18th day of my cycle which is usually 29 days long and the last cycle was unusually 33 days long. I don't want to take I pill unnecessary because it affects cycle badly. Is there a  chance I can get pregnant, in that case, I should take an I pill?