overstimulation with vibrators

hi! i got a clit sucking vibe about two weeks ago, and i ADORE it. ive never had more powerful orgasms. the only thing is that when i usually reach them, the feeling is SO overwhelming that i almost immediately HAVE to turn it off. it's not even a voluntary thing, my knee jerk instinct is to turn it off as fast as possible. does this happen to anyone else? is there any way i can drag it out/is it even healthy to try and drag it out? the only other way i can describe the orgasm is like on the exact other scale of suffering an injury, in which you NEED the feeling to stop immediately. it's really weird ! please share your experiences!