Can a lower impacted wisdom tooth cause referred pain to upper jaw and hard palate? Hurts between upper & lower jaw where dental nerve is. : (

Referred pain. Yes wisdom teeth may do some of the signs and symptoms. But there are other entities that can do the same. You need a differential diagnosis from a dentist/ ENT/ oral surgeon. They will help rule out what it is not and how to help you.
Yes. Same side only. Not to contralateral side. Called referred pain. Rare. .