These are not likely withdrawal symptoms and if they go away when you are back on some medication, that may be the end of it...but if it continues, you should get a neurological examination.
They don't sound like normal withdrawal symptoms.
If not from the med then maybe ?anxiety-related.
I would also ask the expert on the dental health expert forum (or some other related forum) about the jaw stuff. The talk about surgery seems to raise red flags for me and I would also be looking at that as a potential source.
Could you have ?TMJ? A dentist should be able to tell what is going on.
My own experience is withdrawal can cause anything, but one of the side effects of being on Celexa is jaw clenching and other muscle tension. Odd it happens when you quit; happens to me when I'm on it.