This is a very old note I made somewhere in the '80's.
In case of an acute pain, press with a fingernail (pencil) at the middle of the upper lip for about 10 secs. Depending on which side your aching tooth occurs you press the lower- and upper jaw acupoints. Use alcohol or peroxide to rinse.
Beware, this is a temporary solution, go and see a dentist.
Other point that might help you.
Click images to enlarge.
Tooth ache points: 8, 114, 119, 120.
Tooth points on the foot: the light green dots under the toes.
Give it a try..