Today was the 3rd or 4th time using aneros helix syn trident, and it was the first time that I started feeling something with it, probably helped that I wore 2-3h before an anal plug.

I was contracting the sphinter and pc muscles, making the aneros stimulate the prostate, and an increasing feeling started to build. It was pretty intense, and I was thinking that this could be my first PO or something like that, but the more intense it was, the more I needed to pee. I made a pause to pee, because I really needed it (I peed A LOT, and it was transparent), and when I continued with the aneros, it was way less intense. I continued using it until I reached the feeling, but again, the more intense the feeling was, the more I needed to pee. I stopped again to pee (it was a lot, and transparent again), and the same happened, when I continued, the felling was less intense. I just finished with a penis orgasm because it was late.

Any advice for this? Next day I'll try to pee without taking off the aneros ans trying to not lose the progress. Should I drink water the last hours before starting?