Nerve wracking day

Today my 5 year old has an appointment with a psychiatrist. I'm nervous. I'm nervous that its my fault. What if all of her anger and severe mood swings are because of me and "bad" parenting? I've suffered from depression my whole life, her biological dad was diagnosed bi-polar as well as depressed. I know the odds arnt on her side. We try to make this a happy home for her. I just don't know what else to do. I hope that we are able to get some answers. I want my baby to be happy and enjoy her life. She's missing out on so much of her childhood. It breaks my heart.