My own worst enemy

I have been attending a train the trainers session , six days of last week. And , I found out I am my own worst enemy.
I am a natural at facilitating , I do a good job especially when I am well prepared.
Unfortunately , when my facilitating is under scrutiny and I am being examined, I kind of get so worked up , and so fearful of the fellow trainers who are very likely to give me a hard time that I become fierce.
So I realise , if only I focus and center myself in my heart space , am sincere and gentle as I know I am capable of , I won t become fierce...
Lesson learnt ..how long will I remember and not do it to myself again?????