Ok so I had my Depo-Shot on september 15th, 2009 it was my first and only shot. I missed the second shot and decided to have unprotected sex two days later. is there a chance that i could be pregnant just after the first shot and missing the second one. The only reason i ask is because i was also on my period when we did it so i didnt think it would matter then i found out you can get pregnant on your period and a week later the period stopped. My doctor told me when i got the shot i would have my period for a couple months, so I'm a little confused and don't want to be pregnant, so I was just wondering if it was actually possible before I thought the worst. Thankl you for anyone who can help me answer this question I would really appreciate it.