I've been on the Microlite birth control pill for four months. I take it at the same time everyday and I have never missed one. I was having intercourse with my boyfriend but stopped before he ejaculated. I notice immediately after we stopped that I had a brown discharge. This discharge was present for the rest of the day and a bit of the next day. I'm terrified this is a sign of pregnancy /implantation bleeding as we have sex regularly and although I'm on birth control and he always pulls out (which I know isn't a method) we never use a condom so fluids could get in. Am I pregnant? I have not missed a period yet.