Ughh why can't I masturbate.!!?(TMI)

I tried everything to changing positions, watching porn, vibrator, fantasizing and I just can't get an orgasm.! I've never had one and really want to feel it but it's like Everytime i masturbate I hit the spot and my vagina just tightens(like a kegal) and omggg it feels sooo amazing but then it stops.! Like I always get to "almost there" but it never happens. I keep doing what makes me feel that way but the feeling just comes and goes ugh. Anyone else has this feeling or has gone thru this.?? I feel like I'm going to forever be that girl that never gets an orgasm lol