I take it you were alone when you went in for surgery. In your circumstance, I would find somebody, I trusted and knew about my disorder very well, sign a temporary Power of Attorney, over decisions, in medical procedures, admittance to any other facilites,etc.Take this person with you. You wouldnt be admitted to any mental hospital against your will, unless, they TRULY thought you would be a harm to yourself or to others.
Trish