Clementine Breen, a biological female, said she felt “more anxiety than I had ever felt in my entire life” upon transitioning into a transgender man.

Breen, a teenager, is no longer undergoing a gender transition and instead identifies as “cisgender,” which means she accepts her biological sex. Breen is suing her former doctors for not vetting her properly before her transgender surgery, in which they performed a double mastectomy on her at the age of 14.