I pissed my pants in front of my entire class.

So, this happened a few days ago. I was in my last class for the day (history) and I was working on a project when I noticed that I had to pee really bad so I went up to the teachers desk (it was at the front of the classroom) to ask if I could go to the bathroom but she said no cuz she's an annoying teacher so I went to sit back down but it just happened, warm, wet piss trickled down my legs and made a big puddle. Everyone saw it and they all started laughing at me, one of the mean girls yelled out "eww she pissed herself" and I wanted to die. The teacher told everyone to calm down and told me to go get cleaned up so I walked to the office and asked to call my mum because I didn't have a phone. She came and picked me up. I've been faking being sick because I don't want to show my face in school.