panic

I've been reading like crazy all summer... I know once school starts I won't have time to do the things I love like read and play video games and sit in front of the computer for hours, and it's sad...
The panic is closing in. When I think about it (less than a week!) I feel my chest closing and I can't breathe. How will I survive another year? What if it's like last year? I was so busy last year... so busy I think I have some PTSD from it... all those days living in my car, eating in the shower and at stop signs (when I actually did eat), doing homework at stoplights and with the heat on in the car... every second just doing homework... no time to think, no time to feel... throwing up every weekend, so depressed, antisocial, pushing people away, confused, lost, angry... And SO frusterated...
Can I handle another year like that? Can I change things? Can I prevent it from happening again? Can I stop that horrible clock inside me?
Something about business... a little bit's fun... a lot is actually traumatizing...