Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. I suggest you are over working your brain. At the age of 12, you are too immature to understand about mood swings. You must be upset because your requirements are not fulfilled or your needs are not met. Tired because of the disappointment related to the above happenings converted into laziness and in turn tiredness. Your mother, being a nurse, knows you, your problem and what you require. Just obey her and concentrate on your studies and mischief. Your duties are just two things - studies and play. Do it properly. If you require more of my help in this aspect,Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition further. Hope this answers your query. Available for further clarifications. Good luck.