Hi! I had my first depo shot August 14th and then had unprotected sex the following Saturday (10 days after). What are the chances of being pregnant? I researched and a lot of places said that it took about 7 days for the shot to be effective if it was given off your menstrual cycle, which mine was. Just a bit nervous and would like some reassurance that my chances of being pregnant are very very slim. I'm only 16 and I've never done something this major before. Any help is appreciated!