BFN again. Ny advice?

Waiting
Hello Ladies,
So I tested again today 11dpo BFN. We r TTC over 2 yrs now. Never had a BFP. Did 2 failed <a href="https://glowing.com/glow-fertility-program">IUI</a>. Unexplained. I was only told I have thin uterine lining. This month it was just cycle monitoring at CD12 I had only 1follicle 18mm & 7mm lining which is not ideal for conception. I don't have PCOS husband has Gud sperms. Do u ladies have similar experience or tips to share? I am so disappointed yet again.