I'm on the generic version of loestrin and i have the same period symptoms. And I freak because i know that sometimes we're not supposed to get our periods, which is gonna trip me out to think i'm pregnant. But yeah, it's supposed to change the consistency and length as well as lightness. It's shocking and I didn't think it was normal when i started, coming from what I used to experience. But with some googling and talking to my obgyn, it's quite normal.