On the last two calc I tests I got a 92 and an 86, respectively. All entirely due to calculation errors, and I really don't know how to stop making them. Starting at about an hour before class and all the way through an exam, I get mind-numbing anxiety attacks. I feel like I'm completely rushing through every problem (15-20 questions in an hour), but somehow I end up being one of the last still working, even before I check my answers. It's unbelievably frustrating because I whiz through all the problem sets, I'm very active during group problem solving and class discussion (the professor has even noted this multiple times), but the course is entirely graded on tests. I just had a test today on chain rule, implicit differentiation, related rates, and log/inverse differentiation and I feel absolutely horrible about it. I did every problem because I knew how to set up every problem. I knew how to do all of the problems! At least, I think I did, maybe I really don't know the material. At this point I'm simply anticipating an okay grade for the test, but I really need to step it up. I'm making it a goal to get a 95 or better on the rest of the tests. I'm not sure where my problem might lie (anxiety? I'm certainly studying enough, and spend about 2-3 hours on exercises a day), so any suggestions at all would be most welcome.