I've read about (I can't exactly remember where) mustering up just 20 seconds of courage to say something hard. The rest of the conversation would be a breeze after the initial OMG I can't believe I just went there!!

I've used the idea a couple of times, not in T but IRL and my knees were knocking. But it did clear up a couple of misunderstandings at work and one giant one at home.

Good luck!