Where Does Self Confidence Come From?

It's the question of the day for me. Where does self confidence come from? Why don't I have any? Like today, for example. I am teaching at Juliana's which is always a wonderful experience. The students are always very complimentary when class is over. I've never heard one bad thing about my teaching but right now I'm sitting here nervous about teaching. Why don't I ever believe my own good press?

After class today, my best yoga bud in the entire world, Ruth is taking me over to LA Fitness to talk to the person who hires the yoga teachers for all the clubs in this area. I am totally nervous about this meeting. Now, not only am I a Registered Yoga Teacher certified by the Yoga Alliance and CPR certified but I also worked at Curves for a year and a half. I've lost 95 pounds in my life. I'M FRIENDS WITH RICHARD SIMMONS!!!! It seems to me that I would be a great fit for them but still I am nervous. What if they don't like me? What if they do like me? The idea of walking up in front of 30 or 40 people and teaching is making me sick to my stomach. Why am I even doing this? Yeah, I need to find my self confidence. Where is it?