Getting fed up!

Every cycle is another negative followed by Af. Ten months total ttc and had a chemical in March 6 months ago and still haven’t been able to get pregnant since. Everyone always says “maybe you’re not having sex at the right time” even though I clearly have been while ovulating each month. All my hormone tests came back clear and now I have to get progesterone done and get an internal ultrasound to make sure everything is good and working down there. I’m just so heartbroken, I can’t understand why we conceived so quickly the first time and now it seems next to impossible to conceive again. I don’t understand how we get the timing so perfect every month yet it just won’t happen. It feels like my last pregnancy was my only chance and it got taken from me and now my one chance is gone and it’ll never happen 🥺