on june 30th, i got my first depo shot. i read that if you got the shot off your period, you need alternate forms of protection for 7 days. i waited 12 days and had unprotected sex with my boyfriend. he didnt ejaculate in me, but he was inside of me without a condom. i didnt get my period at all in july and its not the 28. is this normal to miss your period after your first shot or am i pregnant? any advice is helpful, please.