Can’t get pregnant

I was on birth control and got pregnant almost 3 years ago and ended up losing my baby girl at 4 months along. I haven’t taken birth control since and I can not get pregnant and I think the birth control played a part in me getting pregnant the first time. Does anyone have any suggestions on what I could take or do other then getting back on birth control to get pregnant?! I feel like I’m going on year 3 of trying and its never going to happen and I’m almost 23. I feel like I should be in my prime