This is my first month after going off my birth control pills. I was supposed to get my period yesterday (Fri 6/ 25) and I havent gotten it. This entire week i felt period cramping and my breasts are very sore. I took a pregnancy test on Thurs and it was negative. It kept feeling like i was going to get my period any minute but it hasent come. Is it common to not get your period after stopping the pills or could something me wrong?