Is this enough to p a piss test?

Here's the deal, I'm 15 and I'm on probation and I've smoked yesterday, and three times before that earlier this month. And I wasn't just smoking reggie, I was smoking highgrade marijuana, does this affect how fast it comes out of my system? My piss test is in 10 days and I need to get it out of my system. Starting today I'm drinking a gallon of water throughout the day, for everyday until my piss test. (I'm fully aware of water poisioning). Today is already over, I drank the gallon no problem. On top of that I'm gonna be skateboarding 2 hours a day everyday too, it's June in Florida.. So i'll be sweating a lot! Think this is enough to p the test?