OK, for most people in late teens and early 20s prohormones do not produce results. Your nat test is already very high, make the most of it. Train hard with heavy compound movements. If you want to use prohormones check some of the info on the site about sides. The nors do not normally have any, the andros (not the 4-andro) have some.
As for the thrist, I can't say. For me - I had a better workout and better pump. That made we work even harder and loose more water. I did drink more, but nothing like you describe