I think this is likely a GP using the wrong terminology thing. My GP calls mine a "chronic fatigue fibroy type of thing" 🙈 I have to correct her and tell her I have MEcfs and not fibromyalgia.
Chronic fatigue is a symptom really of something else. Chronic fatigue syndrome (M.E.) is a distinct illness often triggered by a virus or something else but is a condition in itself. I do hope it's the former. It's possible you have either.
That's good news you have a clinic. I've never been seen at one. I was referred back to it but heard nothing in years. I can't be bothered to chase it up because they're based a fifty minute drive from here and are not going to tell me anything I don't know by now.
The diagnostic for MEcfs is non refreshing sleep, sleep disturbance, sometimes they consider alcohol intolerance and the key feature is PEM ( post exertional malaise).
It's all a bit of a learning journey but we're here to chat to anytime x It has been my greatest support having people on FB support groups and here with wisdom that has helped.