Maybe I was a little harsh before but you've got to act more responsibly. That is an insane amount of cocaine to do in such a short period of time and I'd imagine you felt more than a little worn as you racked up those last few lines.
How's your nose feeling as well? I used to bleed on 3-4 grams stretched over much longer periods of time.
Have you been to a doctor lately? Despite your age it might be worth getting your blood pressure checked or at least a routine physical, you may not like the results.
Anyway, I'm not here to scare you into anything.
http://www.cocaine-effects.com/
There's probably nothing there you don't already know, but seriously that is one of the worst substances you can put into your body in those amounts.