Feeling frustrated

AF was due today, no sign of her yet. But all BFN so far. This is IUI #2, and we're just shy of 2 years of infertility. So far all tests are normal, meaning unexplained infertility. Just wondering when it'll be our turn. 😢 just need some support at this point... I know I'm not out until AF shows, and if she's still not here my RE will do blood work on Wednesday, but after all these months and weeks of waiting.. I'm just feeling so down.