I have been on birth control pills (sprintec) for over 2 years. I went to the gynecologist today and started the depo shot, my period is suppose to be next wednesday. But since I'm on depo I know I could not have a period. But since I was on the birth control pills up to this point and had a shot. Could I get pregnant? I have read about where it says the first day of your period. But I am almost 5 days out. So am I covered or what?