Best thing you can really do if you have an abscess, which seems to be the case, and cant go see a dentist soon is:
Rinse the abscessed tooth often with warm water with a teaspoon of salt per cup.
Take strong analgetics / anti-inflamatory meds (ibuprofen for example) although these rarely do much good in this condition, don't even bother with aspirin.
Take sedatives to put you to sleep, although you will be waken up by pain once the analgetics wore off most likely but you will get some rest which will make coping with pain a bit easier.
See a dentist asap!
I know how fucked up teeth can be. I was at times in so much pain I ran around my house in circles because I just couldnt stand it.
