Hello rebecca,
It's nice to meet you. Welcome to PC
I can relate to your story, so thank you for sharing it. I can particularly relate to having to deal with anxiety and depression at a young age. I can also relate with the feeling of losing myself. I found that therapy and medication have helped me along with talking about it with the supportive people here. Sometimes it feels overwhelming but I hope you find some relief in talking about things with people who get it.
I am sure others here can also relate to your feelings. The sub-forums for Depression and Anxiety are full of amazing, helpful people so feel free to check them out and talk more about what you're going through.
I can reassure you that you're not alone in what you're feeling.