Help?

So I'm not sure if I'm orgasming or not.

I get really really sensitive from my vibrator, but I don't feel a big "release" or anything? I tense up, it feels really good, and then I get way too sensitive in a good way, but it doesn't seem like an orgasm? Just more like edging? I'm really sensitive afterwards to the point earn water gets a "Ah!" Reaction out of me.

Help?