Hayden Panettiere described her struggles with postpartum depression and substance abuse in her 2026 memoir, “This Is Me: A Reckoning,” months before her tragic death. The “Heroes” actress gave birth to her and Wladimir Klitschko’s daughter, Kaya, in December 2014. In the book, Panettiere wrote that she experienced a “traumatic” birth that included 14 hours of labor, a three-hour surgery after the C-section and seven blood transfusions. Following the terrifying ordeal, Panettiere said she “felt nothing” when she first met her baby. “She seemed like someone else’s baby, not mine. I had always heard that mothers feel an instant rush of…