i think i have the worst social anxiety

im in 10th grade and i have the worst social anxiety whenever i talk infront of the class my voice sounds like its gonna cry and my legs start shaking and i get really red and i forget what to say and im just very awkward, i can never raise my hand in class cause i think they will judge me for how i dress,talk or even look, i hate being at highschool and social anxiety makes me want to not go to school