I get nervous around new people, not like I'm afraid they'll judge me. I fumble while talking. Sometimes I can't even start the first word. This happens when I've to give any speech or answer any question in my class. Even though I know the answer I cannot start and get stuck with words. When I'm around my people I stammer in two cases, one when I'm really angry and another when I'm too excited about something. This happened in my viva too, but the teacher was cooperative and gave me time. How can I overcome this? I don't want to look stupid infront of new people.