have I had an orgasm?

I know this seems silly to some and everyone says you'll know but I really don't.  It's like I'll feel this huge build up and I start throbbing and contracting but then it just stops...and like I'm wetter but nothing is coming out of me really. When you come do you always leak fluid out kind of like guys? Or do you come sometimes and there's just more fluid but it doesn't squirt out or anything like that? I've masturbated a lot and I have sex with my s.o all the time but I really have no clue if I'm coming or not. And if not what's wrong with me?