Yes I suffer with this too. It used to be worse for me in the past but I'm slowly trying to get myself out of the house. There's times whenever I'm out in public where I get very anxious and I'm afraid that I might have an anxiety attack or see my abuser: this scares me a lot which keeps me inside my house most of the time. This also stops me from trying to make friends, cause I'm afraid they might know him or something: but I understand that it's paranoia that I have.

Start off small: go out for a walk and if it makes you nervous going out, make sure it's closer to home so that way you can get home in case you have an anxiety attack or something. Bring yourself some water and maybe an ipod: try listening to soothing music when you're outside. It'll simply relax you and take you're mind off of things. Music has helped me and it seems to be one of the things right now that relaxes me whenever I go out. Try this out and see if this helps you out. Another thing you could do is go to a park and take in nature that's around you. Focus on it and look at all the birds that's flying in the sky. The more you focus so deeply on something, little by little you'll notice how more relaxed you've become.