Ouch.

Hi,
I'm 15 and have been having headaches every evening for a few years now. They start around half 4 and get increasingly worse until i sleep, when i wake up in the morning they are fine. The pain of them seems to be getting higher and I now often feel sick with these headaches. I was referred to a specialist doctor but all he told me to do was start eating round 3000 calories a day. As someone who dislikes eating (not because i have an eating disorder, i just don't like it) i hated this idea, but went through with it for quite a while anyway as i was so desperate for a cure, however this proved ineffective. I was just wondering if anyone had an idea of what i could do or what could be wrong with me!