Sorry to hear that you are in pain. Well; since the pain is localized to the TMJ
area it could be due to dysfunction of the TMJ. Another possibility is sinusitis; as you have a runny nose with pain in the mid facial and tooth area.
If the affected is the joint; chewing soft food and using both sides of your jaw while chewing will help. Local heat to affected joint will help ease the pain. If there is an associated sinus infection; after examining you, your doctor will prescribe you drugs for the same. Steam inhalation will soothen your pain.