Miscarriage & trying to conceive

My husband & I have been friends for 3 years now, and back in January we gave things a try. We got married in april. We got pregnant in jan. and we were both wicked excited about becoming parents. In february we found out I had a miscarriage. It was the hardest thing we had ever gone through. But with the support of each other && our familys it made this difficult time easier to handle. After the miscarriage, i had a surgry done & we had agreed to wait a little bit to try. I got on the shot for birth control, and I was only on that for 3 months then stopped it. A little bit of time passed and I got on the pill. Ive been off of that since about august. My husband and I wanna have a baby, and we havent been using protection to see if Ill get pregnant. Still nothing. Im not sure if it has to do with the shot or the birth control, or if we just not doing something right. Does anything have any ideas or know anything that could help us?