i always stop 😩😩

every time i'm about to cum and i'm shaking and everything's going numb and i'm outta breath and grabbing him or the bed super hard i just make him stop because i feel like my body is going to explode or i'm going to go crazy and the first time it ever happened i didn't get what was happening but now i'm more experienced and know what's happening but i just can't go through with it, it makes me whole body insane idk how to keep with it