How to clam down am extremely painful toothache because i can't see the dentist until tomorrow?

Difficult: It depends on the type of pain, if it is cold sense then pain control (meds) may be the only way to help but not take it away. If it is not cold sense then an ice pack, salt water rinses, even a heat pack at times, but if there is throbbing and swelling don't use heat which will increase the swelling. Sadly not many great ways. Good luck.

Ibuprofen: Most tooth pain is a result of inflammation. Try taking 4 over the counter Ibuprofen which is an anti-inflammatory pain medication (aka: motrin, advil) every 6 hours. You can alternate with 2 extra strength tylenol (acetaminophen) every few hours if the initial Motrin stops working after a few hours. Please do not take either of these if you allergic to either of these medications or related medications.

This is hard: By the time you have a roaring toothache the nerve of the tooth is probably involved. Ibuprofen/advil/motrin may be helpful. Sit upright, don't lay down. If ice or heat helps, go for it. Sometimes otc remedies such as anbesol or orabese-b can help take the edge off. Most endodontists have emergency services available. Please, in the future, don't let it get this far.