Oh my. I really am sorry for the experience you had! In my state they are not permitted to hospitalize you without your consent except in extreme cases, and this is only a 36 hour suicide hold in a regular hospital.

I am sure your civil rights were violated (you are American I assume) and I really hope that you are able to do something about this, not only to assure it does not happen to you again, but so that it does not happen to others as well.

Good luck and I am so sorry you had to experience this.