First I Would Like To Say Me And My Fiance

First I would like to say me and my fiance are trying to conceive. I had my daughter Feb 2013 and March 2013 after my 6 weeks, I got on the depo birth control shot. I took the birth control all the way up to September 2014. We've been trying for 4 months and it's nothing. When I was on the depo birth control I bleed the whole time being on it. Can you please help me and tell me what I should do?