Her dad has her back! Season 7 of Teen Mom OG was a rough one for Catelynn Lowell as fans watched her hit rock bottom in her battle with mental illness. After experiencing a heartbreaking miscarriage, Cate was having suicidal thoughts and she immediately checked into a rehab program. Even though Cate took proactive steps to get help for her mental illnesses, fans have continued to bash her online - and her dad David Lowell recently came to her defense, slaying trolls and sending his daughter some sweet words of encouragement.