that is a problem. While reading the beginning of your message, I planned to ask if maybe she wasn't purposefully "keeping" you sick, but just had a general distrust of medicine and doctors---my inlaws RARELY see doctors and only take aspirin. If they get prescribed something, they NEVER take it. They don't trust medicine at all.
But in reading on, I see that's not really the problem. Are you the only one who has these issues with your mother? Possibly because you're the only one with a chronic illness? If you aren't the only one, it seems like no one would look forward to being around her. If you ARE---does everyone else see it? or do they think you overreact?
I guess I'm just wondering what the rest of your family (besides your husband) thinks about this. Can you talk to any of them about it?
It's really hard to change people sometimes, so if you have already tried to talk to her about it, and ask her not to be so involved in your medical history and that doesn't work---the only thing I can think of is avoidance. That doesn't really solve anything, but it removes the stress from your life.
Is there anyway you and the rest of your family can sit your mom down and talk to her about this? Or if that would be too confrontational, then just sit down and have a one on one?