Help with infertility?

A few years back I got pregnant by my longtime boyfriend and we chose to abort due to us being young, immature, and not financially stable to raise a child. Lately we have decided to start trying but it seems like no matter what we do we are unsuccessful. Any tips or tricks to help with infertility? I'm trying to abstain from a fertility specialist unless I really have exhausted all options. Also I was told by by my gyn that my hormone levels came out within normal limits and my pelvic ultrasounds looked perfectly fine. Am I just stressing myself out?