I had a root canal done 3 weeks ago and a temporary crown placed. 5 days ago the permanent crown was placed and felt just fine the last 4 days. Today I was woke up in the middle of the night to the area throbbing so bad even tylenol and later ibuprofen havent helped. Is this normal? Is the crown still just settling and this is normal sensitivity? The area looks completely normal. No swelling or obvious/visible abscesses. It is the 2nd to last back left molar.