I wanted to respond to your post as another person who has experienced infertility. We found out my husband has severe MFI, so started the process of IVF treatment using ICSI. We then found that I had low ovarian reserve, so few eggs and didn’t respond well to IVF meds. We tried for 8 years, did 5 rounds of IVF and eventually on our last round tried donor eggs, and I’m now pregnant at 40. There was a miscarriage and a biochemical pregnancy thrown in there too. So, we will hopefully get there now in the end, but it’s an awful, lonely, miserable situation to be in and I have huge sympathy for you.
I too found it terribly difficult at times to be around pregnant women and see baby announcements etc - it’s normal, be kind to yourself and limit exposure to those things if you need to. It took a long time for me to decide to use a donor, and it was a case of needing time, going through the process of trying with my own eggs, and exploring all the options.
Things that helped - open, honest conversations with each other; specialist counselling via our IVF clinics; talking to friends who had been through IVF; trying to keep doing nice things with other so infertility doesn’t dominate life (holidays, gigs, cinema, whatever you fancy or can afford). I always found my husband and I have our best talks when out of the house - on a walk or out for dinner.
There is an infertility board on mumsnet (in the becoming a parent section I think), where you may get more informed advice about possible treatment options. As others have said, ICSI can be done with very few sperm.
You’re in a very difficult position, and I very sincerely wish you all the best xx