I am on regular birth control for almost a year now (sprintec) and am religious, I have only missed 3 pills and took them immediately (this was the beginning of me taking the pills). About 4 weeks ago I was prescribed Amoxicillan for a head cold the a week and a half before I started my period. I continued taking my bc at the same time and started my period 3 days early and (Thursday) and continued my period until the following Friday (my normal period is 7 days so this is not unusual). I had unprotected sex on Friday night. I started my bc back up on Saturday and was nervous so I took the morning after pill on Sunday. I continued taking my bc regularly and should start my period this coming Monday. I think it is just my anxiety but j have been very nervous about this upcoming period not coming (either due to the morning after pill or other causes) can someone give me a peacee of mind? Thanks!