Anxiety at school

Today I had this oral physics test. I has studied a lot and I knew everything.

When the teacher called, everything seemed right, he even asked the thing I knew better.

After a while, I got a formula wrong, I started panicking, and I forgot everything I had studied. My hands started shaking to the point I couldn't even write, my breath was kinda heavy and I had hot flashes. My face was red, and the next moment I was pale, and it happened more than once. For a moment I couldn't even talk anymore.

My change of colour kinda scared my teacher because I looked like I was about to faint (and I felt like it too), but these were also symptoms of a panic attack arriving.

Fortunately this teacher knows about my panic attacks because I talked with him about my issue.

He went to the blackboard where I was standing, he clenead the blackboard and he told me to start all over again. He guided me on what I was saying and I managed to finish the interrogation, but I didn't solve the problem he assigned me.

At the end, I was convinced it had been a total mess, so I ran after the teacher to ask him if I could do that interrogation again because I was disgusted on myself. He said I didn't have to worry.

He gave me a pretty good mark (8/10), but I feel I didn't deserve this mark. My interrogation was a total mess, and that's a fact.

If it was possible, I'd like to attend this test again, but the teacher wouldn't allow it with the mark I got. What do you think? And do you have any advice for this damn anxiety attacking me for no reason during tests?