I think it is something else. You have a pattern, things you have "learned" over a long period of time and now you are trying to do the exact opposite; you have no references for this life, no background, safety net (it sounds like) or support? I don't know who wouldn't be scared to go outside because of that?

Can you call a friend, relative, anyone (even from your old life) to come help you get out of the house and to the doctor's? Call a cab to come take you and bring you home? You need some real live people in your life, you've gone from out of control to stuck in your own head/house! Neither one of those is "correct"/healthy and meds aren't necessarily going to help. Get to the doctor's and get a therapist and figure out how to start some healthy interaction with other people.

Living in your own head, alone, we can talk ourselves into any darn thing we imagine because we have no other people to bounce things off of and interact with to get feedback. Don't talk yourself into agoraphobia!