Do you have to start birth control on Sunday i am starting to use the pill and I was suppose to start on Sunday and didnt it has been a week since my period has been gone and I want to start it now?

no u don't have to start sunday, they just tell you a specfic date so that they pill can work with the natural flow of your cycle. you can start whenever you want but your period might be a little of track and just be careful with intercourse the first couple of months and let the pill take effect.