Presentation tomorrow

Presentation tomorrow I’m taking an Art class as an elective in college. Last Friday my professor said we have an assignment to do (draw something about you) and I did. However we’re gonna have to present it in front of the whole class (explain your drawing and how it relates to you probably; he didn’t go that much into detail about it) my heart is pounding right now. Any advice? P.S. to be clear on what I drew, I drew a earphones connecting to an iPhone