If you are having any pain or problems with your teeth you should go see a dentist, as soon as possible. If you wait, you may make things worse. Below are some things you can tell the dentist you are experiencing.
I have a really bad tooth ache.
My teeth are really sensitive when I eat or drink things that are hot or cold.
My gums bleed when I brush my teeth.
My tooth is loose.
I think I might have cracked my tooth.
It hurts when I bite down.
The answers to all of these depend on you and your dentist. Just make sure you call and make an appointment if any of these occur.