One thing you can try is..

One thing you can try is.. One thing you can try is to reinvent yourself, speak slightly slower, 10 to 20% slower from the way you were about to. It sometimes almost feels like substituting, you're saying the same thing but differently enough as if to process, this is not gonna work, I will reset, reprocess, forget it. It may lessen the nerves, relieve the tension, and let you let that previous attempt go. I do not think we have to consistently talk slower but changes in what we were about to run into may trick the body as a substitute would.