First of all - good luck. It can be a long, and sometimes painful road, but you're not alone - there are a lot of us out there who've been through this and I think anyone who has, will want you to know that despite what can often feel a lonely process, you really are not alone.
I went through the Lister twice. It was ok. The doctor - and scanner (very important person) were supportive and knowledgable. It's a very medicalised environment, and I quite liked that. Ultimately, I didn't feel they offered the detail I needed. That didn't work a couple of times however so through a recommendation, I heard about Sara (say: Sarah) Matthews. She doesn't advertise and is based at great Portland St. She's something of a maverick and possibly not for everyone. It's a very unmedicalised environment - pink leather seats, scented candles. However, her treatment involved a lot more drugs plus various other types of therapy (for me - hypnotherapy - odd, very expensive, but I threw everything at it for the last round). It's expensive. I have friends who she's worked for and someone who didn't like her - she's very glamorous and big personality. For me however, I felt she suddenly addressed concerns that had not been looked at previously. Maybe worth investigating.
https://www.sarajmatthews.com/ . It finally worked for me here.
I'm sure you're done all this but do make sure you're BOTH looked at. It's generally both of you who need help whatever some doctors say.
From someone who's had multiple rounds of ICSI plus a load of other stuff over 5 years, I would also recommend this lady -
https://www.melaniebrownnutrition.com/. She's not expensive in the scale of all of this - although what she 'prescribes' start to add up. She's very no nonsense and practical. I felt there was something in it. Your husband should go through this process to.
Either way, very best of luck. It doesn't work for everyone; I wish someone had said that to me earlier in the process. But all you can do is give it your best shot. It's half magic and half medicine I think, so I hope the magic part happens for you.