Long term scars as I call it. Because recovery was traumatic in some ways, especially when you are so young and going through recovery. Forced to spend months locked away in a building with staff and other sick people, there is nothing healthy about that situation. I even had restricted meeting time with my family... I.e for a period of about a week or two I wasn't allowed to meet family because the staff said it triggered me too much and made me too upset. that didn't help me at all.... I wasn't allowed to just call my mum whenever I wanted to either.
I would suggest that first you figure out what it is that is scaring you and still causing you problems and anxiety. Then try to think rationally or work through those fears by talking about it with someone or trying to convince and remind yourself why those things shouldn't bother or scare you anymore.
Everyone's fears are different so it's hard to give proper advice as it can be so different for everybody. But when it's things from your recovery that still bother you then talking about them with someone can really help. And trying to overcome the fears..... for example, the only way I could overcome my anxiety and fear over sleeping somewhere else was to do just that.... when I was away from home I would remind myself that it was ok. I would be home again soon and that helped a bit.