Sensitive teeth

Went to the dentist yesterday – I was so sure I needed a filling in one tooth.

Well he checked it throughly, and even took xrays to make sure – there was no hole.
So he blew the air thing on it, and OWWWWWW!! 
Turns out I have sensitive teeth, as I said it hurt when I drank or when it was cold. I hadn’t even thought of this. So yeah, have to have some stuff put on by him over 6 weeks, and use sensitive toothpaste from now on.