I hope you do well in your maths exam tomorrow. Please try not to fall asleep during the middle of it or start to daydream about your future when you see an extremely long question that you don't want to even look at. If you get a mental blank during the exam and forget all the formulas you spent an hour trying to learn, don't worry, you still have another chance, in your dreams that night.
Try to refrain from having coffee on the morning as well, apparently it makes you forget everything. Although I don't know you well, I hear from other people (i stalkjust like you, how coincidental!) that you cannot resist the temptation of having coffee every morning. You say it's to keep your hands warm...but everyone knows the truth, except you. Don't discourage yourself just because you failed the pass paper, you know you can do it! You have a very bright road ahead of you... filled with numbers and triangles (non-right angled). Just follow your 3 guidance teachers: sin, cos and tan. They will lead to towards a very large spread range, called standard deviation. Then you keep walking along that road, to reach your ultimate goal: death. After all, that's your goal in life. To do everything possible to reach that goal safely, solving mathematical problems along the way and making new friends such as the mean, median and interquartile range.