At no time do you mention you're in treatment for this. Are you in therapy, and if not, why not? Childhood fears are not the same necessarily as adult ones. While it's understandable you want your Mom to make it all better, she really can't and hasn't and didn't when she was living there, right? I mean, you still developed all this stuff when she was still there. I also assume you and your Mom have a phone and that you can still meet and talk. Families breaking apart are always hard -- on everyone, not just on people who suffer with anxiety as you do. There are things we just can't do anything about in life and things we can -- you can see someone to find out why you are so insecure and so frightened at such a young age without being able to fix your family, but I suspect your family situation, which didn't start when your Mom moved out, it's why she moved out, has a lot to do with it because you're young and have developed a tight and understandable dependency on her. We all do that with our parents and especially our Moms. But the anxiety disorder you're describing has to be dealt with no matter what happens and will have to be dealt with if you do move in with your Mom or if she did move back in with your family. See where I'm going with this? You have to do some work now so your life, and it is your life, can be all you hope it will be.