Crystal - I have not taken Cymbalta myself and haven't really heard enough about it from other TMJers to know what to think. I do know some sufferers who are taking it, but they still seem to have pain. But I wouldn't expect it to just take away the pain anyway.
It is best to start at a lower dose for a good month and then increase it if needed. That's about how long it takes for any anti-d to start working. It's funny now but when I first started taking Prozac 10 so years ago, I didn't care about anything. And I mean anything. I told my doctor that and he said we need to lower the dose. I was taking too high of a dose every day. In some ways, it felt good not to care but it also bothered me not to "feel."
Give it more time. If after a month you don't notice very much, slowly increase the dose for another month. By then you should know if it's going to help or not. It may or may not take the pain away immediately. For me, it calms my body. What can I say? I used to be an up-tight person I guess.
I hope you aren't hurting by the time you leave the massage therapist? I know it always hurts me, but at the end, I am in heaven.
Take care and God bless...
Carol