orgasam

hi guys so i am 22yrs and i have recently been expirementing and i have a few problems sometimes i cant tell if i have had an orgasam or not theres certain spots i touch and completly lose control over my body such as twitching and legs shakeing i never really have the pulsing though and when i can tell that i am close and will orgasam it feels super intense for a long time but then the feeling just disappears along with the signs... haveing trouble crossing that wall and telling when i am able to cross that wall....