finds life very hard with it
It's certainly life changing

Diagnosis is difficult and can take a long time. I also have the added complications of arthritis, spondylolysis and ulnar palsy so those took priority for a while, but when I started having difficulty with vocabulary and remembering certain things, my daughter grew increasingly concerned. I had tests which ruled out dementia & Alzheimer's, but it was so frustrating that some days I just couldn't read anything or remember which words to use. I quite often say its as if someone has cut my vocabulary in half. It's even more annoying to know that in the past I could just soak up knowledge and remember numbers no problem.
It was the Neurosurgeon who when looking at MRI results for spondylolysis said he suspected I may have also FM, but it was outside their specialist area and I'd have to be referred to Muscular Skeletal for diagnosis. Up until then I'd never really heard of FM. When I saw the MSK consultant, the diagnosis was immediately confirmed.
The really hard part is getting medication right. Some of the pain killers have caused havoc with my digestive system... and I didn't do too well on Gabapentin - I think I was off my head a lot of the time - but they swapped that to Pregabalin which is suiting me better and at least gives me some respite from RLS if nothing else.
but it seems some get relief from medicinal cannabis,
It is something I have only just started to research. All I'm really aware of from others on the FM groups is the H&B version isn't strong enough for MS & FM as its too dilute. :/