My last period started around 3rd or 4th February. My bf and I had sex the week after my period had ended. 2 weeks later, my period was supposed to be due on the 2nd or 3rd March, I was getting all my period symptoms but there was no blood, so I started stressing the fact that I could be preg. But on the 6th, my period came and it was heavy for 2-3 days and now its light. My period usually lasts 5-6 days.