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 if an attack is accompanied by:
Fainting or loss of consciousness
A very slow, racing, or irregular heartbeat
Chest pain or severe breathing difficulty
New weakness, confusion, trouble speaking, or loss of balance
Seizure-like movements, particularly if they are new
Emergency evaluation may include heart monitoring as well as neurological tests.
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 if pain is preventing normal eating or drinking, causing weight loss, or becoming more frequent despite treatment.
New hoarseness, persistent difficulty swallowing, hearing changes, facial weakness, or numbness also needs timely assessment.
3
Does any of this apply?
Book an appointment
Arrange a routine medical appointment for repeated, brief, shock-like pain in the throat, tongue, ear, or jaw, especially when swallowing or talking triggers it.
Similar symptoms can have several causes, so an assessment is needed rather than self-diagnosis.
The article also says
A person who has fainted should not drive themselves for assessment.
Every sign above is quoted from the sofidex article on Glossopharyngeal neuralgia. If you are not sure, err upward — it is always reasonable to be checked.