Dog Jaw Pain What's Wrong With My Dog? (she's In A Lot Of Pain)?

What's wrong with my dog? (she's in a lot of pain)? - dog jaw pain

So a few days, my mother began to notice that my dog was a little stiff. Yesterday seemed stiff and does not seem to have much energy. When he tried to jump on me, it was only the front paws of the country, but then groaned and went down. Today seems to be much worse. I slept on a chair behind her and she also slept. Then I woke up, I put my foot on her and she awakens with a start and began to scream like a madman, because he had moved too fast or something. She seemed to have a lot of pain, but after some time had seemed long enough to be stretched not his fault. I left it for a toilet break and had to help her down the stairs, but he got up from his gut. If it goes very slowly and hass back arched.

She's old enough, somewhere in the age group 14-16 years, but it has always been active as a puppy, but it seems that dogs tremors (Parkinson's?) In the jaw a couple years.

I think my mother just said to give Wal-Mart brand of dog food has not changed at all, so do not think that it will not be a "sufficient amount of vitamins" has.

So what happened? What can I do to help? My mother wanted him aspirin, but she said she had coated aspirin on damage to the stomach. My father told me that him to the vet, who for years, except for recordings. I fear that might be too old and could plan PUT-down: (Please help me!