I am currently late 7 days! I have been on prometrium for the last 3 months; 4 months including this month and normally get my period for 10 days as its used to regulate my period. Well, this month, I am on day 7 of the pill and no AF. I have not tested, but did LVM for my GYN to call me and see if I can go in for a blood test to find out. I have EXTREMELY sore breasts, constipation, and barely touch my food when in front of me. Any advice or has anyone experienced this?