Struggling with anxiety

(bad English warning)

Not too long ago, in school, the teacher is telling me to go next for my presentation

My friend encourage and wish me good luck, so I walked with a little bit confidence in me, but it didn't last long

Let's just say I quite, no, really messed my presentation

My voice and body was shaking that it was too obvious, I couldn't keep eye contact with my classmate at all

After the presentation is done, I sat down in my seat and buried my face in my hands, then start thinking bad thought like "idiot, stupid me, why did you stutter like heck, no wonder why they call you an embarrassment"

I'm sorry to bother you with this post