I agree with people above, go tell your parents and visit the ER, doses of any medicine this high isn't got, stop taking it and visit ER.
I hope you'll be okay.
Please visit the emergency room immediately. The dose you took is a toxic level, and could cause major medical problems.
Why are you doing this? This drug is extremely liver toxic. I'd get to a doctor right away and get my liver checked out, and stop taking this drug at high dosages if you want to see 17.