you've had a bad day, everyone has bad days, make sure it doesnt affect your confidence.
my last lesson had a number of mistakes, including almost having a coach crash into me (yes it was extremely close). it wasnt my fault but i felt like crap feeling that i couldve dealt with it in a better way.
oh well, just make sure you feel good and energised and motivated before you go to your next lesson, and itll be better.