Why won't it stop!

So I'm on the depo and the doc said if my period doesn't start a week or two after it I won't get the prolonged bleeding thing so when I finally did get my period after a week and a bit I was like okay sweet but... this was 32 days ago and it hasn't gone away it's not light flow either it's a pretty decent fill couple tampons a day flow, they've tried to give me Provera to get rid of it but it's making me get really depressed, I'm only 16 so this is a massive struggle being in highschool and I just want this bleeding to go awayy