First I will give you the facts: I am on birth control. I was due to get my period on March 27 (my body is usually very promt. I always run from tuesday to sunday) I obviously stop on Sunday due to starting a new pack of pills. I did not get my period until Friday afternoon. It was extremely heavy at first and it is now Saturday morning and it is already very light. I took a test Tuesday night and it said that I was not pregnant. My breasts were tender last week, but are no longer. I had was I assumed was a stomache bug all week that kept me out of work on Wed, Thurs, and Friday (as well as a nasty cold). Also I have horendus heartburn that wakes me up between 2 and 3 every morning and I can't get rid of it. I am seeking immediate advice because I start my new pack of pills on Sunday and I just want to be sure.