I'm 14 years old, 6'2, 73 kilos, and for the last three months I have been experiencing the above symptoms. I am constantly exhausted no matter how long I sleep. I have dizzy spells where I get extremely light-headed and feel as though I will pass out. My joints ache, and I feel as though I am constantly recovering from the flu. My family doctor did some blood tests about two months ago, my white count was elevated so she prescribed antibiotics. I took the full course, I've been eating properly and taking a multivitamin every day, which she suggested. Two weeks ago I started getting really heavy nosebleeds and mild fevers. I don't know whats wrong or what I can/should do. Please help!