What Crystalmc said, prisoner in my mind, although there's other reasons why that is as well.
It's like...I know that what I'm panaicking about is irrational and I have no clue why I'm panicking and why I feel the need to run away as fast as I can. It's like every thought brings some sort of doubt. It's like everyone is watching me every second of the day, like there's someone always following me and standing right behind me. It's like I left the house with a neon sign floating above me pointing at me saying "LOOK AT ME! EVERYBODY LOOK AT THIS IDIOT HERE WHO CAN'T SOCIALIZE AND IS OBVIOUSLY FREAKING OUT RIGHT NOW!". And I also can't seem to do simple things such as send someone a text, or pay for shopping, or do anything without wondering what the other person is thinking. (And obviously, I was an idiot for sending that tex saying "Hi" and they hate me now and think I'm some sort of whiny, desperate loser.)
It's hell on earth.