TTC for 2 years! 😔

Been TTC for 2 years on and off. Finished all my tests at the infertility clinic and the confirmed that I'm in working order but it's still not happening! This month, I thought this was it! I started bleeding for a few days around 14 days into my cycle (which was strange), I'm normally very frequent. I'm now on day 38 of my cycle and still no AF and negative pregancy tests. I guess It must have been AF on day 14 and nothing else 😔 has anyone else experience this? My doctor didn't seem too concerned when I told him? Xx