Photoshop Text Problem

Sorry, I hate to be a pest, but I have a problem witht he text in Photoshop CS2.

Yesterday when I tried to use the text, it was set at 12pt, but it was too small- I had to put it at 120pt to get a regular size. 
But, today it's set at 12pt and it's really big, like I'm using 36pt. 

Does anyone know what's wrong?
Thanks in advance