I'm 19 Years Old And I'm On The Depo Shot.

I'm 19 years old and I'm on the depo shot. I got it in september. Ive been bleeding for a little while. On Halloween I was at work and a fleshy chunk came out. People online were saying it's a miscarriage. It looked like it. I went to the hospital and they said it wasn't. I'm still trying to figure out what was going on.