Help me i dont no what to do!!!!!why so much stress???

ok ive always had high stress lvls but this is driving me nuts!!! im 13 and i have a stress lvl of a 18 year old and i cant handdle it!!! and thats even with out trying in school...i got all this sh** on my mind just thinking of 8th grade is stressing me out even more!!!! i get sick becuz how stressed i am head akes and not eating right.....and im getting braces tomorrow june 14 and thats just a nother lvl along with my parents being devorced and thinking i need counseling and my two teen brothers!!! plz help!!!!!