That seems like a very long and very high dosed cycle for a 2nd cycle especially considering your age. Why the high dose on test, and why 15 weeks? You have your whole life ahead of you. This isn't a race, its a marathon....pace yourself.
You shouldn't need more than 500mg test if its legit and not underdosed.
I also don't think you should use tren for a second cycle. You are young, and IMO you shouldn't be using anything yet....but at the least dont rush into these heavy dosed cycles at your age