Why is ttc so stressful??

This is our 3rd month trying. 1st month was a chemical and I was so disappointed. Since then it’s so stressful and all I think about is wanting another baby. Ovulation comes around and I feel like we over think it and it ruins the sex sometimes. 😔 Our 1st was an accident, 2nd we got pregnant first try and did it so effortlessly now trying for 3rd and I just don’t even know why I got myself into this.. all I want is another baby and I feel like it’s not going to happen if I keep stressing about it. Ugh just in my feelings because I’m in my fertile window and sex was a fail tonight 😞