I agree with supporting her head... maybe experiment with positions whilst lying down. Could you fold a light blanket to lift it a little? Move her a little further up the bed? DD started to really dig in with her top teeth and I always had little dents when she finished, drove me batty, needless to say hurt alot! When I make a concious effort to raise her head a little it takes the pressure off and we now have very few probs.

And you're not a bad mummy for taking her in, my DD is teething and grumpy but we have to go in today for ours too. At the moment I'd be hard pressed to find a day it seems her teeth aren't bugging her so we just have to go for it. If you really feel she's not up for it just have her checked and put off the imm. until another day it's awful whether they're happy or not hope all goes well!