Why can’t I conceive?

Jasmyne • 21! Pregnant with my first

I know it takes time. But I’m young and healthy. Why can’t I get pregnant it’s destroying me mentally every time I start my period and realize I’m not pregnant. Maybe it’s because I’m trying so hard. Maybe it’s because I want it to bad but what do I do. It’s heart breaking. Month after month after month. What am I doing wrong. Someone please help.. I’m 21 and been trying for about 6 months now