I have Been on the depo since February of this year. I use to be on it last year in march was my last shot. I received it again in the beginning of may I also had unprotected sex that same day then five days after ever since I had sex a week later I was nauseous had headaches, back pain I dont get a period so I dont know if Im pregnant
Hi and thank you so much for this query.  If am so sorry to hear about this troubling thought of possible pregnancy going through your mind right now. Deprovera, like every other contraceptive is not 100% effective at preventing pregnancy.  Having unprotected sex on the same day after receiving this Chat Doctor.  Considering all of this and the above symptoms, I will suggest that you stay at least 2 weeks for the day of last intercourse and get a pregnancy test done. This will tell whether you are pregnant or not. Please, Demo may prevent against pregnancy but not diseases, always consider using a protection during intercourse to avoid contracting STDs. I hope this answers your query fully. Please feel free to return with more questions if need be. I wish you good health.