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 if you have severe difficulty breathing, blue or grey lips, rapidly worsening stridor, or you cannot speak because you are struggling for air.
Do not drive yourself if breathing is severely affected.
Seek urgent medical assessment for new noisy breathing, repeated choking with difficulty recovering, or an inability to swallow liquids.
New breathing problems after neck or chest surgery also need urgent assessment.
Contact your care team sooner than planned if swallowing or breathing is getting worse, you develop repeated chest infections, or your voice change is interfering significantly with communication.
These symptoms do not prove nerve damage, but they should be evaluated.
Arrange a routine appointment if a hoarse or changed voice lasts longer than four weeks.
Earlier assessment is appropriate if the change began after surgery or intubation, or if it occurs with a neck lump, coughing up blood, unexplained weight loss, or a history of tobacco use.
Every sign above is quoted from the sofidex article on Laryngeal nerve damage. If you are not sure, err upward — it is always reasonable to be checked.