Weird feeling during sex

Yall wtfffff. I’ve NEVER had sex cause an orgasm. Only from masterbating or touching myself during sex. But I noticed that I feel like I’m about to orgasm during sex but then I get this weird feeling, it’s not exactly pain, but I HAVE to stop/change positions..... I’ve heard of an orgasm feeling like you are going to pee so I try to let it go and thought it was similar but I just truly cannot and it keeps happening. Is that my body trying to orgasm or is something wrong?? 😬