Swollen neck, jaw. Sinus or tooth issue?

I have pain in the ear and jaw for 2 months. Swelling in the lower jaw under the ear for one and a half months. Had sinus infection and taken antibiotics. Sinus cleared up, but jaw pain and swelling still there. No change at all. Went to ENT, did Endo to see sinus and said no infect in ear and sinus. Told me to take CT scan to see if the jaw swelling is from any sinus related infection.Went to dentist and no Infection on any tooth. They said I might grind or clench at night. The pain is so severe. Last 2 days, I feel pain in the neck. It's like sore, burning pain. On top of the neck under the jaw. Only that side. Swollen lymph nodes may be. It really hurts throughout the day and night. I feel throbbing pain in the upper jaw, ear and lower jaw along with neck pain whenever I lie down.  The pain and swelling was only in jaw and ear for one a half months. Now having in the neck 2 days.Whether this neck pain and swelling is because of sinus issue or TMJ or upper wisdom tooth? Please help..