I started depo when I was 16 and I am now 19 I was suppose to get my shot last month or this month and didn't and I havent had my period to this day plus me and my boyfriend have been having unprotected sex since last month I been experienceing back pain and cramps but I don't if that's my body getting use to not taking the shot and im scared I might be pregnant and I'm also to scared to do a test how long does it take to get pregnant after being off depo for a month