Chemistry test

      I just flunked my test today it was crazy!!!! I guessed on all of the questions.I am talking about my Chemistry test I took today.It was hard for me, well I think out of 20 I knew 5 of the answer other I guessed. And I kept going back and changing the answer because I wasn't sure for the other 15 I didn't knew. Well, I really had problem with the multiple choice but when I looked at the back there were 2 ESSAY questions. I am screwed I am pretty sure that I got those totally wrong because I had no idea what I was talking about. It was Crazy:! I don't get anything about the class. I hate Chemistry maybe its the teacher who's teaching it.