I had the depo shot in Dec. Of 2011 and I have tried since March to get pregnant.. and no luck.. idk what to do from here

It takes the average couple 1-2 years of actively trying, tracking ovulation, to conceive. You've only been trying for 10 months. Are you tracking your ovulation using basal temperature? Are you having sex when you're ovulating, or are you just leaving it to chance?