Anyone experience a BFN before a BFP before AF?

Second question, if you’ve started <a href="https://glowing.com/glow-fertility-program">IUI</a> treatments. Did letrozole make you late on your period months after?

(Had a blood hcg test it’s negative, but that was four days ago. How late can a period truly bc if everything was regular before hand? I’m 32 and know my body.) something’s off letz or pregnancy.

Has anyone experienced this with <a href="https://glowing.com/glow-fertility-program">IUI</a>?!