Hi. I Took The Depo Shot In Early October And

Hi. I took the Depo shot in early October and started bleeding more. Doc put me on an oral to stop it and after two and a half weeks it stopped but only for about a week or so then started up again. They gave me the second Depo shot at 8 weeks thinking that would do the trick but now I've been bleeding for 23 days straight and no end in sight. What the heck? My periods were just fine before I tried this. I needed contraception and this seemed like a better option than remembering to take a pill every day. What do I do? I don't have a lot of money for tests and my insurance carries a high deductible so tests will be out of pocket. Have you seen this before? What are the potential issues here?