I'm 14 years old, and I have major mood swings. I have told my mother, because I think that I need help, but she has told me that I'm just a teenager, and that I'm overacting, that teens go through mood swings because of all the hormones pumping into their bodies. She has told me twice that I'm just looking for attention, and that I need to stop calling for sympathy.

I am really happy, and laugh about everything, and I feel like I could move mountains some days, then I'm sad and I feel like just ending my life other times. I don't want anyone to think that I'm being obnoxious and calling attention to myself, so I spend a lot of my time in my closet. My dad found me in my closet once, and told everyone, and now whenever I'm sad, my mom says: "are you going to go hide in the closet, and think mean little thoughts in your head?" I haven't cut myself yet or anything, but I have gotten a knife from the knife block. I'm afraid that I will feel so suffocated that I'll just end it all. I have tried telling my mom, but she thinks that I am just seeking attention. I'm scared to tell her anything, but I'm also scared of what I'll do to myself. Please help me? What should I do?