I am a first time user of Depo Provera (if that's how you spell it) I had the shot three days ago and haven't felt any symptoms at all (headaches,bleeding,etc) I feel 100% fine. Im concerned because I'm worried its not working in my body ? the doctor didn't have any problems administering it. I just feel that I should be having some kind of reaction now ? they say you should wait a week before having sex but I'm worried I won't have any symptoms within the week and so I'm wary of having sex until I know it's working. Can someone help??