headaches,dizziness,nausea,fears,crying

im 13 years old and had headaches about a mounth and a half ago.
i got really scared and started to think i had a brain tumour so i went to the doctors then the day after they disserpered. but for some reason they come a week before my period then stay till i get examened off the doctor. But i have the headaches for the second time they came before my period and are still here and i feel terrible i feel sick when i eat also when im not eating i get headaches,dizziness,shaking,and cry alot and DREAD going to school infact i cry when it comes to school. so i went back to the doctor hoping it would go away but it hasnt and im so scared incase im dying and i still think ive got a brain tumour.And i cant stand the way i feel.

I have the same things going on with me.....did u ever figure out what it was????