I was diagnosed with Fibromyalgia, ME/CFS, possibly Polymyagia 
Rheumatica- Rheumatologist disagreed.
After 4 years my GP gave me a chance course of antibiotics for a chest 
throat and sinus infection and my symptoms of mainly arthritis and muscle 
weakness improved.
GP suspected Lyme Disease and there was a history of bites, bulls eye 
rashes,  summer flu' and migrating arthralgias all reported to the doctors 
but no one had considered Lyme Disease.
Eventually Lyme Disease was confirmed by a specialist and I was treated 
on long term oral antibiotics. 
I was unable to walk up and down stairs properly for 3 1/2 years now I can cycle 
and have no pain or disability although I had been retired early from the Civil 
Service on Ill Health Grounds.
I am 100% recovered and no longer on antibiotics or any medication. Life 
is a joy.
Sadly the controversy surrounding ME/CFS and Lyme Disease causes many people not 
to be properly assessed to see if their ME/CFS could be an infection such as 
Lyme disease.
I was lucky but it took 5 doctors and 3 Rheumatologists 4 years to diagnose me.