TTC and losing hope

Hubby and I have been ttc for 16 months. I'm incredibly regular and he already has children from a relationship before me. This month I was 2 days late, which never happens, and we used preseed so my hopes were super high. And I wake up this morning feeling great like THIS IS THE MONTH! And then BOOM af decides to show up. I'm starting to lose faith and hope and I just don't know if I can handle the let down anymore?! Does anyone else feel this way or is it just me? It's like every month I'm reminded that I'm not pregnant and I can't help but to blame myself even though everything has been tested to be perfectly healthy and fine.. 😥