[Starseeker]

Two weeks before Christmas I wrote a Geography test and it went well. However, a week later my class was supposed to write it again, because the teacher had lost our tests, but I didn't write it for the second time since I was sick.
Yesterday I learned that people who didn't write it twice would have to answer the questions on the class forum today. I panicked and I told my Mum I didn't want to go. Each time a teacher asks me publicly I forget everything I know and I can't speak and I'm on the verge of tears.
I wanted to visit the school counsellor, but the one I know was absent and I was afraid to visit a different one.
So I left school and came home. My Mum texted me and she's probably going to call, but I'm extremely terrified of talking to her. I know she'll be furious.
I don't know what to do.