Can you get a 2nd opinion? My very Ltd experience is when they are not quite sure what’s wrong they tell you that you have fibromyalgia. It’s the same a irritable bowl syndrome. They give you a tablet but don’t find the cause.
The number of people who have it has risen massively recently. Yet, 10 or 20 years ago I’d never heard of it.
Have you explored other alternatives? Diet, allergic or intolerant to foods? Lacking in iron, vitamin D etc? Did your blood tests show anything?
I can’t help but feel it gets rid of you, the Dr’s have diagnosed you and given you a prescription. What makes them positive it’s fibromyalgia?
My advice is don’t just accept the diagnosis!