Severe tooth pain, neck pain could it be TMJ?

I went to the dentist the other day because it feels like my entire lower right mouth is on fire with pain. My upper is flaring up as well. He took an Xray of one tooth and said he thought it was inflammed gums and to use Listerine and provided me with Tylenol 3. Well the Listerine makes my mouth feel better for about 2 minutes,and it feels WONDERUL to brush my teeth, but hurts again as soon as I am done. The tyleonl doesnt touch the pain. Now I am getting pain into my neck and just behind my ear. There is no popping or clicking. Could it be TMJ?