need some help

Ok so I have a VERY VERY important exam coming which will determine which highschool I get into, so naturally I have to study and work very hard, but it also means my mom doesn't allow me to play minecraft until the exam is over......which is more than 60 days later which also means my claims will all get removed which is a huge problem so I dont really know what to do about it I really dont want dalaran to get griefed and such so what do I do I need some advice! 

also excuse me for any wrong english grammar language, english is my 3rd language