Stretch marks on the back of my thighs

So I've recently looked at the back of my legs and see tons stretch marks under my butt and lower I was so shocked, I have stretch marks on my butt from before pregnancy but have gotten them on my boobs behind my thighs but not my stomach. Anyone else? Do you know how to fade them ? I'm just so upset about this because I'm already self conscious about my legs/body it's depressing knowing I'll never be able to wear shorts again.