I usually get my period around the end of the month and got the shot in the middle of the month and had unprotected sex 3 days after without protection and i think he came inside me.. I already had a baby 2 months ago i honestly cannot have another baby :( if i am pregnant is there anything i can do because todays the day i had sex and if i can take anything to prevent it right now then i really need to!! Please help?? Im reading now how long you have to wait but i couldnt understand what my doctor was saying about the shot and this is my first time on birth control!