Dude, pay your dentist a visit (just to check) and seek a second opinion, its the only way. If your taking that many painkillers then there is obviously something wrong, that much paracetamol is really bad for your liver, not to mention your poor kidneys. If the pain is really bad, you might want to try a stonger pain killer, something along the lines of Morphine may help :-D, seriously, you may want to try and anti-inflamatory like ibuprofen, just as bad for you, but you may find you need less of it. However, that is only a temporary solution, you need it fixed, so as I said, seek a second opinion. And above all else, get well soon :-)
