Depo Provera? Endometriosis, and hormones..?

I have been on depo provera for a few months, and I have been bleeding everyday the entire time. So, I am now weening off of it and I have morning sickness. (I feel like puking a few hours after waking). I know that with hormones you can experience morning sickness... but how long until these hormones wear off? I need to stop bleeding so I can have again and just stop feeling so pms-ey all the dad gum time, and I'm sick of feeling nauseated and tired. This totally blows. But I need to know how long until the hormones are gone so I can start another kind of hormone regimen because if I have a period again normally I will just die in pain and won't be able to function. Help!