Hate for chemistry

When I was in high school, I enjoyed chemistry. But now that I have to take it at college, I realized how much I dread going to class everyday. I took a quiz for lab in chemistry today and I failed miserably. I was so upset because it dropped my grade 3% and that's huge! The problem with this quiz was that there was content about out next lab which hadn't been done yet. I just think it is so stupid to do that and expect the students to do well! I don't understand how we are supposed to do problems using equations we haven't even learned yet. I am livid. Absolutely cannot believe that my grade dropped so much.