I just stopped taking birth control pills after my last period in August. I was expecting my period on Sunday 9/13 but it didn't come. For the past few days I have been having cramps in my lower abdomen and back pains that I usually get when my period starts, but it still hasn't started. I have taken 3 pregnancy tests that were all negative. Is my body just adjusting to not being on the pill? I thought about making a doctors appointment if I still don't get it by next week. Any thoughts or advice?