TTC at 20; any advice

Annelise • Mom of 5
So I'm 20 an married. We been TTC since last year. It's been really hard trying to figure this out. Our lives are stable an amazing an we are just waiting to complete our family with a baby. I'll admit it's stressful trying for the last year. My periods an cycle is regular an always on the dot. So why is this so difficult ?