Re: Severe pain please help
Happened to me once when my wisdom teeth were moving. The dentist said that the tooth had shifted and was pressing against the tendon that opens and shuts the jaw. It went away on its own after a few days.
You have signs of infection, though, so I suspect you have an abscess also. One way or another, you are probably going to lose your wisdom tooth soon. If you have any others that are impacted, you might as well have them all taken out at once. I did all 4 at once, under sedation, and it was no sweat.