Hi OP, your situation is practically identical to mine.
We had IVF, mainly we think due to problems with DH rather than me but we didn’t do many tests. He didn’t want to tell his family, so they don’t know, but some of mine do. We were successful and have a daughter, but we would have loved to have more.
It has created a distance between DH and his family, and they absolutely blame me for it. I think they feel I’ve cut him off from them but it’s not me at all. His brother has just had his third child, and it does hurt that we can’t have what they have.
There was a huge fallout a few weeks ago, with MIL have a go at us, though mainly me, for not being involved enough with them. I ended up storming out of her house; it was humiliating. What’s worse, we have to keep up the pretence that I’m the one who has issues because DH won’t tell them the truth.
I have no advice, but you’re not alone.
Good luck with the IVF. I found the process quite straightforward and I wasn’t affected too much by the drugs, so please don’t be daunted by it. It will hopefully be worth it. 