Numbness after eating - Just had fillings

I had two amalgam fillings replaced in the last molars on the upper and lower.  I have a very small mouth and the dentist gave me plenty of novacaine in the area, so I feel like he did a lot of pushing on my jaw during the procedure.  For two weeks afterwards I was unable to open my mouth enough to take a bite of a sandwich, but it didn't hurt to chew once I got the food in my mouth. I spoke with my dentist and he said there was a possibilty that my jaw was bruised and to take Advil and use a warm compress on the area and try to "exercise the jaw".  Well, the jaw now opens a bit better, except now everytime I eat, my bottom lip from the middle of my mouth to midway down my right jaw become numb as if I have had a shot of novacaine.  It lasts about 20 minutes or so then goes away.  Afterwards, my jaw feels achey (achy).  Not sure what it is or what exactly is causing it.  Any ideas?

[scottma]

Seeing an orofacial pain specialist or tmj specialist is advised.