it's not that easy to get pregnant. It take a while to get pregnant either naturally or with medical intervention.
If you're in a long term relation ship then regular sex will help you get pregnant as well as charting your BBT and Cervical Mucus. There is about a 30% chance per cycle of getting pregnant. You can also try ovulation prediction kits which you pee on and it detects a hormone and tells you if you are ovulating or not.
If you've been trying for over a year with no results still then it might be worth seeing your doctor and having some tests done to see why you're not getting pregnant