if you got a hangover, the 'filler' in your tab was bs. mdma is your main ingredient.. and you want tab that's pure.. but due to greed/the market you get other shit in your pill that may or may not cause a 'hangover' the next day, or some other illness blamed on x(other than the bodily harm of course). if your gonna fvck with this drug, get yourself a test kit before you take something you got from your local recreational drug dealer.
as far as the effect of it goes.. get some good x, get a hot girl, take 2, give her 2, wait 1-2hrs.. and go to the bedroom... BLISS