Pants shopping for difficult body type!?

I have an annoying body type that is very hard to shop for when trying to find pants. I'm not overweight or anything 5'4" and 135lbs and am athletic: competitive dance and cheer, running, weights, and such. Anyway I have very curvy thighs and a big butt, but a small waist. It's terrible trying to find pants that fit because they are all built for apple bodies but I'm a pear. Everything that fits on my thighs and butt is too big on my waist, and if it fits my waist, it's too small on the hips and butt. I end up just cinching my pants up with a belt so they stay up. It's annoying though because I'm always pulling my pants up all day long because they're too big on my waist!! UGHHH!! I'm at the end of my wits here...any advice? help? PLEASE!