Getting discouraged

I know I shouldn’t complain because I have two perfectly healthy kids but trying for the third has been so stressful. Currently on second round and at 10dpt/8dpo getting stark white tests. With my first kid we got pregnant first cycle and with the second it was the second cycle. I don’t know if it’s because I’m slightly older than I was when we had the others or what but I had a great 21mm follicle that was triggered and I’m bummed that this isn’t working. 😔 I know I’m not out until my period comes but I feel like I knew by this point with my other two (yes I know this is early, no negative Nancy comments please). Any positive words or stories are welcomed.