Fatigue and weakness

I AM ALWAYS VERY TIRED, HAVE NO ENERGY, AND FEEL WEAKER AND WEAKER AS TIME GOES ON. I AM ALWAYS BEING ENCOURAGED TO EXERCISE WHICH I USED TO DO BEFORE MY LIFE WITH FIBRO. NOW IT IS PAINFUL TO USE MY MUSCLES. I USED TO LOOK A LOT DIFFERENT; I WAS TONED AND WEIGHED ABOUT 50 LBS. LESS THAN I DO NOW. I ALSO TAKE ANTI-DEPRESSANTS, ADVAIR, ANTI-ANXIETY MEDICATION AND A BENZO TO HELP ME SLEEP WHICH HAS LOST ALL EFFECTIVENESS. HAS ANYONE HAD SUCCESS IN ESTABLISHING A REAL EXERCISE ROUTINE AND NOT JUST A WALK AROUND THE INSIDE OF THEIR HOME? IS BEING FIT A REALITY WITH THIS DISEASE?:?