Orgasm or peeing?

How do you know that you’re about to have an orgasm or you’re just about to flat out pee all over the bed and your partner! 😂😭😭 I keep getting so nervous and I can’t tell if I’m about to pee or have an orgasm so intense up and fight whatever urge I have. .. he keeps telling me it’s not pee but I swear on my life if I was to let go and not tense up I’d pee his bed. SO LADIES! HELP! I need answers. I always pee before and after too! So what’s happening?