HOW IS MY ORGASM SUPPOSED TO FEEL?

So when I’m having sex I always squirt like I get a build up of pressure then 💦💦, but I don’t understand what I’m supposed to be feeling because if that’s how my orgasm is supposed to feel then that’s quite disappointing as all I do is get that build up and shake. When I masturbate I get that build up feeling but slightly different as I can’t really make myself squirt but I feel like that’s because I’m ashamed of it. Any tips on how to orgasm ? Or how it’s supposed to feel? IM ALWAYS TURNED ON AND NOTHING SEEMS TO HELP 😬