Yes go and get the tooth sorted it can cause all kinds of problems you need antibiotics asap.
I would go to your ER dr. If you are having trouble swallowing it could be other things triggering it. Such as allergies, you may be having an allergic reaction to something. But to be sure I would go to your local ER. I'm not a Dr, just a member of a family that has been to the dr. for many problems in the past. I hope you get feeling better.