Why is it that every time I take Ecstacy now (usually a fair few pills) I cannot no matter how hard I try get a piss. I drink water all night and when I feel like it's time to piss I go to the toilet and try and it feels like I am pissing but nothing comes out. It get's really painfull because im pushing so hard, usually it's not until a couple of hours later I can eventually get a piss and then I'm fine after that. None of my mates experience this to the same extent of me, some of them will try and piss and it's take a few minutes then it'll come with a bit of a push and none of them even drink water whilst on pills, most of them will drink vodka or beer. Why does this happen to me?