First time TTC

How does everyone stay relaxed and not worry each cycle? This is our first cycle of TTC our first child and I feel like I’m going crazy waiting to test. I am 12 dpo and my period is scheduled to start in 2 days. It feels like I’ve been waiting forever, but I don’t want to test too early and get disappointed. I know it isn’t super likely on our first try. Any advice on what to do for our best chances?