... an hour after it happened. My period ended the day before or two days before. I ended up bleeding for about 3 days about a week after I took the pill. My period is very irregular but the last few months I've gotten it at the end of the month. It still hasn't come and I'm freaking out. My stress and anxiety has been horrible which can cause my period to delay even more. Should I have anything to worry about? Also, I've never taken birth control so do you think that might be why it's late too?