I have been on birth control for almost 4 years, I started on Micogestin FE 1/20, then I got switched to Gildess FE 1/20. While being on both I never got a solid flow during my sugar pill weeks. Some months there would be just dark brown discharge, and some there would be nothing at all. A month ago I had unprotected sex with my bf a few days before I started my period week. He kinda pulled out, but I'm not sure how much sperm got in me. A week later when I was in the middle of my sugar pills, there was nothing ( I was on a cruise in the Bahamas at the time). I just finished my next sugar pill week and same thing, there was nothing the entire time. COuld I be pregnant or is this just my normal period behavoir?