Need a little advice

Tori • live life to make yourself happy

So my fiancé and I are trying for number 3 and I need help. Sex isn’t fun since we agreed to another baby. I know I’m more Aware Of everything we do because we are trying. And I know we have to relax and just let it happen. But I can’t. I can’t relax. This is my last year to get pregnant (per my doc) and I have to make it happen. Can anyone please help me find a way to relax n have fun again?? SO is open to almost anything..