Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services for severe breathing difficulty, new chest pressure, signs of a stroke, sudden loss of bladder or bowel control with leg weakness, or thoughts of suicide with an immediate risk of harm.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek prompt medical advice for:
A new swollen, hot, or red joint
Persistent fever, night sweats, or unexplained weight loss
New numbness, true muscle weakness, or balance problems
Pain clearly different from your usual pattern
Medicine side effects or worsening depression or anxiety
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if widespread pain, fatigue, or unrefreshing sleep has lasted several weeks or affects daily life.
Seek assessment if previously stable symptoms become harder to manage.
The article also says
Fibromyalgia itself is not normally an emergency, but emergency symptoms should not be assumed to be a flare.
Every sign above is quoted from the sofidex article on Fibromyalgia. If you are not sure, err upward — it is always reasonable to be checked.