Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Emergency: Use your prescribed epinephrine and call emergency services immediately for suspected anaphylaxis.
Also seek emergency help if symptoms worsen, return, or do not improve after the first injection.
Routine follow-up: Contact your healthcare team after the emergency to replace used devices and review what happened.
Get urgent medical care after an accidental injection into a finger, hand, foot, or another unintended area.
Seek help for severe chest pain, collapse, or a very abnormal heartbeat after the injection.
Arrange a routine appointment if your device is nearing expiration, its solution looks abnormal, you are unsure how to use it, or your allergy risks have changed.
Every sign above is quoted from the sofidex article on Giving yourself an epinephrine shot. If you are not sure, err upward — it is always reasonable to be checked.