1st cycle...BFN 😢

So, this is the first time my husband and I are TTC. Our prior children all came unexpectedly. This is our first cycle and I got a BFN. I'm 28 and in good health, never had any fertility issues. So, question ladies... When TTC, can over thinking and stress be a factor? I know it's still early on, but I'm hoping my own over thinking doesn't interfere on my journey to conceiving. Also, any tips for future cycles? Thanks girls!