OP you sound so incredibly resentful of him (with good reason, but that doesn't change the fact)... I am absolutely not judging as my DH and I have been through years of fertility treatments and I understand the stress... but if I'm honest, from your posts, your relationship really doesn't sound like it's in the strongest place for parenting right now.
I'm not getting the feeling that he really wants a child, I might be wrong, but from your post he sounds utterly uninterested.
Why hasn't he had any tests done and why is all of the responsibility for this on you? You simply cannot navigate the minefield of fertility treatment in that way, it will completely burn you out. It's a very, very hard thing - it was one of the most difficult times in my life. You need to both be invested and support each other or you will not make it through.
And you sound irritated and fed up with him to the point where it is impacting your mental health and your relationship.
Please consider whether a child is a sensible thing to add into this mix. Babies don't fix things - they require even more commitment, patience, communication - and on top of that you will both be exhausted. It's hard and it can break couples.
Children need an incredibly strong foundation to feel stable and secure - that involves good communication, love, and empathy with/ between parents.
I'm not saying this to scare you but have you thought about trying to see a couples therapist before you TTC? It just sounds like there are some issues to iron out here OP.