Not Ready

Tomorrow is my English Mid-Year exam, but yet here I am, using the computer. Although I had step out my first step, that is to start doing all my home works and revise at least 2 hours per day, but it seem that it does not help. I try to find out which was the weakness chapters in Chemistry, but I know everything but just do not know why I keep failing. A Math, also I know my problem but just cannot solve and understand the solution unlike E Math which I can master without my teacher's help. Physics, after much practise, I found myself forgetting every equation. Geography and Social Studies, I do not understand what the heck the teachers is explaining about unlike the past which I score well in. It seem like I really seriously lagging or what? Now feeling very confuse, thinking a way to solve my learning problem and solve it as soon as possible, O level coming soon.