You understandably care about your mother, and your sisters. However, your responsibility is to do the best you can for you in regards to health and healthy lifestyle, not to parent your sisters or be the caretaker of your mother either. You're the child, and worrying about whether or not to tell your mom probably takes a lot of your emotional energy. Your mother's responsibility is to find help from adults when it is called for, for herself and those she is concerned about.

You could suggest that the family get help (see a counselor) because you have feelings and questions and concerns that need to talk about. Your school, this Web site and teen hotlines all have referral sources; if your mother works her employee benefits probably cover counseling sessions at different places. And remember, your job at fourteen is to learn, laugh, love life and yourself, take good care of yourself, stay open with your family and stay in touch with friends that are good for you. Good luck!