I am on the pill and have had a normal period cycle for 2 years because of it. I just had, what seemed like, a period between periods. I was in the middle of week 2 on my pills. I missed a pill last month and still had sex. I took the morning after pill at 23 hours after sex. Could this "period" between periods mean i am pregnant? I have one week until my next period and the tests i have taken have said i am not. i do not understand why i am bleeding between periods