Your condition, which I suspect you've had treated by now, is exactly what I suffered over the past week and which led to me becoming very ill and requiring surgery. I now have a huge hole in my mouth where a large drain was inserted to get rid of the infection -- all the way from my jaw to my cheek. The infection from your tooth has spread to various tissues throughout your mouth and face, and if left untreated, will spread to your brain or your neck. In either case, you will become very, very sick, Never ignore dental pain. It can kill you.
You need to see your dentist asap.
No doubt you should see an oral surgeon or root canal specialist. When swelling gets into the neck it can be dangerous.