Sorry to hear about
your problems. Not saying this is your issue but it has been proven that gaining muscle mass to fast can cause fibro issues in people years later.
If one took anabolics or lifted to were your mass created stretch marks from rappid muscle growth you could cause a autonomic or auto-immune response against your own body. Shocking your body/muscles by lifting heavy can cause same effects as would toxic shock just not with a chemical.
Google: youth power lifting and Fibro.
If problem are messing with quality of life. I would ask family Dr. to refer you to Rheumy for a blood work-up to start!