Please tell your mom! If she doesn't understand this is a real problem then tell a school counselor, a pastor, another relative... anyone who will listen and get you the help you need. If you would rather, you can call the National Youth Crises Hotline at 1-800-782-7335. They will talk with you about anything that's on your mind and can perhaps direct you to some help in your area. They may even be able to tell you what to try or where to go for your back pain. It's worth a shot at least. Teenage depression is a real problem, not just a "phase" or "moodiness" as some people think. Please seek some help from somewhere. I wish you well. Please post how things go for you.