sounds like the filling was probably deep and you will most likely need a root canal and a crown.
Take a spoon and tap on the side of the tooth. If it hurts, you might need a canal.
Does it feel like the first thing you touch when you bite on your back teeth?
If it is the first thing you touch, it might be a quick fix when you go back to the dentist, a quick adjustment and it's done,
BUT if it's very painful to tap on it and you are swollen, then you'll probably need a canal.
Can you call his Emergency number and ask him to phone you in some antibiotics and pain meds?
I'd try that first.
Good luck and may God bless. Wish you were in Phoenix, Dar would meet Dar at the office!