i don't know if this is similar to what you're going thru, but there have been times where i've been out and i'd kind of get lost in myself and almost be unconscious of my actions and surroundings. like one time, me and my bf were bickering while we were walking somewhere and i had no idea how to get to where we were going so while i'm busy feeling like shit trying not to start balling on the sidewalk and just not aware of my surroundings at all, i would just keep walking! my bf was yelling to me constantly and i swear i never heard him. i was walking on and on and i wasn't the one walking... does that make sense?? it truly felt like i wasn't in my own body and i was just watching myself walk around. i was completely out of control in that instance until i finally came back and finally heard him yelling to me. my therapist said it did sound like i had a dissociative episode.
anyhow, i also feel really bad when i'm out, even if i'm in a place i'm comfortable and enjoy (like my fave store or a movie). i can only be out for so long before i start freaking out and wanting to rush home, regardless of where i am. and then the second i walk thru the door it just takes like 10 or so mins before i feel calm and ok again. and yes, i also am very careless and do dangerous things when i'm out. i walk into traffic all the time, that's probably the most frequent one.