Hello and welcome,
As a starter, I will share my story, as one says, and hope it helps. I am fortunate to have not had to do IVF but have many friends who have or are and my heart goes out to you.
DS1 was conceived pretty much first month of trying properly. I was done. But then, when he was 2 I started thinking he probably did need a sibling - DH had always said he would like another but respected my decision. So, off the pill, started charting my cycle again....and nothing happened.
Tried multiple things: fertility friend (fantastic site), B12, chinese medicine etc etc. I had a short luteal phase but was ovulating every month. We BD'd when we should (and man, the fun of that wears off mighty quick) and still nada. Finally went and saw a reproductive endo - nothing wrong with me from blood tests and DH fine too. So, was told to have an exploratory lap. Thought about it for a few months and then had it (was not getting any younger). All good, except for a tight endo cervis (who knew we had those!) that they stretched. Thought, yeah, like that is going to do anything, and was pregnant my next cycle. 18 months in total.
If one more person told me to 'relax' I was going to bite them. If one more person was going to hassle me about having another baby I was going to scream. It is horrid, horrid, horrid, that we can control our fertility but not our infertility. I felt like our lives were constantly on hold while we were trying to conceive - I did not want to go for new jobs etc because what if I was not there for 12 months and therefore would not be entitled to mat leave? What to do with DS1's old stuff - keep or give away? And that need, which I had never felt before, to just have a baby - it kills you. Every time I hold DS2 I think how blessed I am to have him and his brother.
Anyway, my thoughts are with you. You should find a lot of support here but also check out fertility friend, some good forums there too (and a little less fraught than it can get on here at times LOL).