I've lost interest in things I used to do. My grades are suffering a little because I've missed so many days of school. I get sick a lot, so when I come back to school from my break I feel extremely overwhelmed since I have so much work to do. I'm not happy anymore. I've felt worthless for the last 5yrs. I don't know how to make myself feel happy. Some days I find myself not wanting to get out of bed, while others I'll be in a great mood. My mom tries to tell me she doesn't think it's bipolar depression, but I'm starting to think it is from what I've heard about the condition. What is going on with me?