Orgasm?or not a orgasm?

Hi I'm a 17 virgin and I gig myself a vibrator as when I tried mastubating I had no feeling at all.So I but it on full blast on my clit and next thing my body is sort of jerking and it's the nicest feeling,then I had these weird stomach cramps like muscles,so I'm guessing they were contracting.Anyway I then was moaning a bit and for some reason I had the urge to pee(even though I peed before I done this) and my vagina was all warm and wet.I then stopped because I was getting a bit loud.Anyway my question is was that a orgasm?and would I of cummed if I didn't stop?thanks.....