Round of applause for showing up and bravely facing your fear! You'll now realize it was never about how others felt about your stammering, but rather how you felt about it. The fact that you managed to present yourself despite being afraid of sudden blocks and stammers will help you more than anything else to accept your stammer and continue to improve. I've been through the same situation a while ago, and I felt such relief and pride that I did it well enough. That helped me a lot to believe in myself, to know that I can give a speech, and that what others think about it doesn't matter. It helped me a lot to accept it and keep improving.