I am very sorry you have been so poorly and it has had such a profound impact on your life. It must have been a very difficult few years for you both.
I wonder if you are giving yourself space to give your DH’s insights a fair hearing? Sometimes I have a pessimistic POV, and my DH challenges that, and he is right. Chronic illness is incredibly draining and difficult. I wonder if your change of mind is a symptom of burn out rather than a life-long decision you have determined over time?
Having kids is really hard, but also really, really great. I wonder whether you would tell a disabled person they aren’t being fair on their offspring by procreating. Maybe not? I wonder if the positive side of kids (and for your kids having you and DH as loving, nurturing parents) could outweigh the difficulty?
I wonder if it might help to speak to a therapist who specialises in chronic illness to help chat this decision through, maybe with both of you together?
These “I wonder”s really are just that - wonderings. You’ve made, or are in the process of making, a really big decision, and I guess I’m just hoping to be helpful with proposing different angles or questions to think about too. That’s what I find helpful. Sorry if it’s not!
I also think, in terms of your relationship, it’ll really help for your DH to feel heard, and like you’re actually considering his reasoning and opinion, and you haven’t just made up your mind by yourself without consulting him. I personally don’t think this is a one-person decision, I think both spouses have a right to really wrestle with this idea and figuring out if the facts/practical elements of your life together really aren’t compatible with kids, and to discuss (even debate!) it together in a supportive and caring environment.