Feeling blue

Really thought this cycle was it. Just tested at 12dpo and not even a hint of a line. Now I'm starting to cramp. Unexplained infertility sucks. It will be four years this summer. I'm lucky I'm eligible for <a href="https://glowing.com/glow-fertility-program">IVF</a> but treatment won't start until December. I going to be 35 in May, just feel my chances are slipping by.