Oh Lord I have just remembered another.
20 years ago when I was at university I had terrible depression. Among other things I was self harming with razor blades, was bulimic, was suicidal. I went to the GP to try and talk to him, and when he asked what was wrong I started with saying that I had terrible insomnia. (I did). I was about to go on, and his response was a dismissive 'well you'd be surprised how little sleep you really need at your age' and hurried me out the door.