Momma - ask at your GP surgery if they have a GP there who specialises in Muscular Skeletal disorders. I was lucky in that my own GP did specialise in exactly that, and he was so supportive.
He put me on meds that worked, gave me sick notes for 2 months at a time, sent me to a specialist who gave me an official diagnosis, and generally listened to me and believed in me. That made an awful lot of difference.
Reading my 1st post back sounds a bit scary where I said I lost my job and home, and though it happened to me, it won't necessarily happen to you, everyone is different. So apologies for that.
I have good days where I can walk for around half a mile, and bad days where I can't even walk to the bathroom. I can't stand up for more than a couple of minutes, and my balance is wonky to say the least. Like Pancakes I too was super fit before this, have put on weight, and have a chaotic nervous system which often gives me the sensation of my skin crawling all over my body. [flowers for you too] .
It's the absolute pits!
Fibro tends to be the last diagnosis a GP will make after they've exhausted all the other possibilities, so you need to push for any and all help you can get. So Momma, find that sympathetic GP, and PM me if you need any more help.