So may good suggestions here! I have fibromyalgia so I am limited too, although I too am not familiar with your condition. Lately I have been walking (as much as I can tolerate) through my town, on hot or yucky days walking (fairly slowly) on a treadmill, doing about 10 minutes on an elliptical on a non strenous level and most importantly for me, stretching. I also find meditation and being careful with my diet helps (sugar and too many carbs are not my friend but neither is not eating.) I know yoga can be great but be careful; even the "easy stuff" might be challenging. Good luck and just remember it's better to do a little at a time and build than to overdo and have to do over, building yourself back up from "below zero" (as I have done many times.) I hope you feel better!
Mini goal: 128 by 6/2 using real and healing foods