Why does this happen?

I have difficulty, sometimes, moving my hands. I have a hard time typing and often even walking. I often feel dizzy and sometimes it is hard for me to breath. I sleep a lot and always feel tired. I cannot concentrate and at night my legs cramp and i cannot sleep. My heart hurts sometimes too and so does my stomach. My hands and feet are often cold and i don't always feel them. I am seventeen years old and i don't understand why this happens. Please help.

[VaBreeze]

I'm sorry you feel so poorly.  Have you been dx'd with fibro or cfs?  It's difficult to tell you why you are having the problems you have listed, but I do think you need to see a physician about them.