Teacher problems

[Wildt4lon]

Ok so basically I have music lessons with my school. We had a maths test on Wednesday and my music lesson was on Thursday also in maths. My teacher got confused at first and thought that my music lesson was on Wednesday.
I told him no, it wasn't and he said fine. But then my music lesson got changed to Wednesday IN MATHS and I had a chance to deny the change but I knew we had cover so there was probably no test
So I realised too late that we had a test and I left halfway through
My maths teacher, after I told him the next day, said he wasn't impressed and I think he suspects that I made it all up in order to skip the test and that my lesson really WAS on Wednesday. Now I go to a grammar school and I'm one of the top ten in my year I would never dream of lying like that, but I think I got into my teachers black books. He kept giving me the evil eye that day
He made me re-sit the test at lunch. I thought he was going to be there but he just handed me the test and told me to do it in the library. I was about to tell him that half the test was calculator and half wasn't and that why was he not going to make sure that I wouldn't use the calculator when I'm not supposed to. However, he turned straight round and walked off and anyway I thought it would be rude to call out, WAIT! so I didn't.
Anyway I did the test and I did not cheat/ use the calculator in the first half but I'm still worried that he suspects me.
HEEEEELP!!! (Yes I am very depressed and worried as maths is one of my favourite subjects- )