Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services or go to an emergency department if there is an immediate danger that you may harm yourself or someone else.
Move away from triggers and weapons or other means of harm if you can do so safely, and involve a trusted person.
Seek urgent help if you feel unable to control aggressive impulses, are thinking about self-harm or suicide, or cannot safely eat, sleep, attend school, or care for yourself because of distress.
Arrange a routine appointment if sound-triggered reactions regularly interfere with daily life, cause significant conflict, or lead you to avoid important activities.
You can also seek help if you have painful hearing, tinnitus, unusual sensitivity to loudness, anxiety, low mood, or symptoms of another condition.
The article also says
A primary care clinician may help assess your general and mental health.
Depending on your symptoms and local services, assessment may involve a mental health professional, audiologist, or ear, nose, and throat specialist.
Every sign above is quoted from the sofidex article on Misophonia. If you are not sure, err upward — it is always reasonable to be checked.