hi-you are flaring because cfids and fms(which i also have)are the only illness that excersize makes WORSE. very small light excersize is okay but there is a fine line where it goes from helpful to not helpful and triggers all your symptoms full on. i really suggest that you not do so much at the gym! find gentler ways of excersizing, yoga, tai chi, etc. and even tai chi is hard on me and its mild! take care!
deb