Right girlies, what does CUMMING feel like

Okay so, i cant tell if iv ever came!! So i can get to a point just by clit play, where it gets so nice and i get a burst of feeling for about 2 seconds but then its way too sensitive to touch. I dont think iv ever came, help me girls, what does an orgasm feel like?? Everyone says youl know when you cum, BUT I CANT TELL, maybe i just get shit ones :( x