I experienced the same thing. I gave birth for the last time just over 8 years ago. Before having kids, my hair was the most beautiful tightly wound ringlets. I LOVED it!! After giving birth it almost went completely straight and turned dark brown from my previous golden and auburn colored hair. I still have the brown hair and my hair is a combo of loose boticelli curls and waves. I'm still holding onto the dream that my curls will return, but as time keeps marching on I am starting to realize that it might not happen.