Why is TTC so hard when we’re actively trying.

Two of my pregnancies were pleasant surprises. One was planned, I got pregnant first month trying. We’ve been having unprotected sex since our third son was born 6 months ago. We wanted Irish twins but for whatever reason we’re having trouble TTC this time around. I had a chemical pregnancy in September which was devastating. I don’t know how you ladies do it month after month. Y’all are a lot stronger than I am. Period is due today or next 3 days and I’m a mess. 😫