Anxious about presentation

OmG GuYs... I am a very shy person in irl and I fucking accidentally locked eyes with my Java teacher now she wants me to present Java I/o file stream. I still haven't done anything. I dont want to stand infront of my classmates and I can't look at them when giving my "speech" , and I go blank when I stand infront of them. How can I get rid of this anxiety??? Helpppo