So I used to be on the Depo birth control shot and last received it in August. I have been having sex with my boyfriend, with and sometimes without a condom for two months. I've had my period once in the first month and currently have it now. The thing is I've been on my current menstrual cycle on & off for the past 3 weeks. I don't know if I'm pregnant and am just finishing my cycle that was interrupted every time I had sex or if the Depo is just wearing off and messing up my cycle. Any ideas or advice?