My DD cut her first tooth yesterday. She has been drooling for a couple of weeks but I thought it was too early for teething, but I guess I was wrong. I checked DS but I don't feel any bumps. I didn't feel bumps before DD's tooth erupted so maybe DS will cut a tooth soon too, he's drooling a ton and is quite cranky.
My DS has been drooling and chewing a ton also - I think he is teething especially after reading your post...he also has 2 white tooth shaped spots on the front of his bottom gumline (I can't see the top gumline). I have been feeling his mouth every day!
ETA- I don't think it's too early though, my cousin's kid was born with a tooth! (And his father is a dentist how crazy is that!?)