i have been having nerve pain in my right side jaw and lower towards my chin but only one side, i have tmj and been wearing my night guard and went to the er dentist and said i may have a cavity as well...cant afford any dental work, so i have a prescription for 600 mg motrin. it works temporarily at best when i am laying down, but when i am standing or sitting up for a long period of time, the nerves inside my right side mouth hurts so bad to where i can't open my mouth to talk or even move my lower lip. it hurts so bad, but when i am laying down, it doesnt. can you tell me what it is I have?