Is the depo shot still wracking my body or what?

Sierra
So for a little background, I'm 19 years old. In January of this past year I got the depo shot and had it renewed in April. I have not had the shot since, and it "expired" in the beginning of July. I have also not gotten any other birth control since. It caused a huge number of problems for me. I started having really bad depression and anxiety (normally very kind, optimistic, and patient, but I became a huge bitch for a while there), was constantly hungry but lost weight, and I've had some sort of period thing last since May (essentially, I get a regular period every month of "fresh" blood, but I'm almost always shedding a black goey stuff too. I have to use tampons almost every day since may and it's October now).
I don't have money to go to the doctor right now since I'm still trying to figure out my health insurance. Does anyone know what this is all about or have had similar symptoms? I don't want to be stuck with this stupid period stuff forever.   :(
Thanks for the help!