I had my 3rd Depo shot on the 5th. And I had started my period few days before this. It's now the 25th and I'm still bleeding its been like 20 days now. I think I went for one period to another without stopping. It's not heavy like they use to be before the shot. Starting to cramp alot. Has anyone experience this before. When will I start to see things change with this shot( if I ever will) .