Is this Social Phobia? do i need Professional help?

I a, a 17 Years boy. I hate presentations because I feel scare and nervous to stand in front of everyone to talk about something. Sometime if teacher call me to answer something i also feel abit scared...i dunno how to express the feeling. When some stranger ask me something i also feel kinda shy and nervous...Am i having SOCIAL PHOBIA? can i overcome this without visit a counselor or physiologist? Because i scare this might affect my pilot job interviews in the future....i will fail the interview if they caught me nervous when they they bombard me with hard question...HELP PLEASE