What is normal sex supposed to feel like and is something wrong with me?

I'm a 29 year old female who cringes when guys want to have sex. It's usually painful, no matter how wet I am or how much lube is used and I didn't have any childhood trauma. Do all women feel pressure in their stomachs and hips when the guy is penetrating? I always feel this pressure and after a couple minutes, no matter how much I tell myself I can take it, I end up pushing away from them or reacting with exhaustion and disgust, in the hopes that it'll be over very soon. I honestly don't know what all the hoopla is over sex. So do all women feel the pressure when guys penetrate or is this something that should have gone away shortly after I broke my virginity? Is it supposed to feel like they're hitting a wall while penetrating? What is normal and what is not normal?