Sorry to hear that you are in such a terrible situation, but it is great that you are standing strong, even if you are being tested now. From what I hear, you have more frustration than sadness going on right now. The best way to kinda ease the pressure is to let it out. Try physical exercise (definitely helps) or taking a bath or reading a book. You need to relax, everybody does. As an immediate tip: stay well hydrated and bring routine into your life. Organization and figuring things out will help you feel less stressed.About getting rid of sadness, listen to happy music, go out with friends, or even do something fun with your mother. Medication shouldn't be your answer, so I won't even go there. Perhaps you should talk to a councilor at school to see if he/she can give you some tips to better deal with school. I finished school and it is a lot of stuff you have to deal with.You also seem attached to your mom. Is your dad around? Perhaps he should also help. Sorry if that isn't the case, just wondering. She is an adult and should take care of her own problems, or at least try to do so. You are not responsible for her and shouldn't feel pressured to being someone for her to lean on.If you ever feel like you can't take anymore, take a break, go for a walk and focus on your breathing. Don't trap yourself in your room / house. Eat something and laugh. By laughing you release the "happy hormones" and you will feel a bit better. Don't be afraid to cry, even if it doesn't do much for you: sometimes you just have to let it out. Take care my friend!