flicking the bean

i recently just purchased a vibrator that stimulates my clit (it kinda looks like a microphone so i’m assuming it’s just for my clit because it’s very large) anyways it feels incredibly good but it’s almost too much and every time i’ll end up having to stop before i get “there” how do i keep going and why am i unable to keep going? i’ve had no issue orgasming with simply penetration from sex but even during sex when he touches my clit its a lottt and i make him stop