Actually, if the rheumatologist is correct (and given your past diagnosis of MS, you might want to get a second opinion, or have him repeat the tests, just to be sure)..
if this diagnosis is correct, this is somewhat better news than you having MS! Hughes Disease is treatable. Not curable, but treatable, and manageable, and not as debilitating as MS.
Here is a website that describes what it is, and how to treat it:
While it is true it would be risky for you to have more children, and you'd have to watch for other blood circulation issues, it sounds like once you start getting proper treatment, you'll feel much better, and do much better overall.
Given how rare and unusual Hughes Disease is -- I'm betting that you've been misdiagnosed as having MS, and in fact your symptoms are tied to the Hughes Disease. But you should definitely talk with your rheumatologist about this, and show him the MRI's where lesions appeared, and see what he thinks.
I hope you'll get proper treatment, and feel better soon.
...I am not a doctor, nor health professional, and don't pretend to be one, here.....