I absolutely agree with you, for a long time i didn't accept fibro as an answer as i also was so very active. I swam for college and still do, i cycle cross country and even completed a fun race some weeks back. Today, i can barely lift a finger and barely got through work.
My physio says he thinks fibromites muscles don;t repair as well after exercise as others do, it would make sense. I get DOMS to the point of not being able to stand sometomes if i overdo it.
If everything else has been ruled out then i'm afraid acceptence is the next step.
As much massage as you can afford, plenty of hydration and i founf magnesium and co enzyme q10 good for when i'm in training for a trip away on the bike.
I also take pain meds before i exercise.
I hope that helps, boo
BikeBoo, biking with my boo since 1999
Of all the things i've lost, i miss my mind the most! But it has its advantages!
Fibro, spinal arthritis and all that goes with it.