ISSUE with base stability

Hey for as long as ive hit puberty I feel like the base of my penis isn't sturdy, and so i can have sex in doggy and other positions fine but with anything with my partner on top it literally bends at the bottom and hurts. I never went to a doctor out of shame but I have no idea if there is a fix for it. Has anyone heard of this or know a way to fix it? Its similar to how a rubber garden hose is sturdy but if held up it folds a bit