I tell people I had a nervous break down back in 2000 .... they say yah right.... I am close to having one now but have to hold it togeher for my sons sake. But shut down is coming....
I was always fascinated byt the thought of Multiple personalities.... but I have dealt with a mom that is very agrophobic at one point she would not drive in a car unless dad was at the wheel. Because she knew she couldnt yank the wheel out of his hand. She has improved by huge amounts over the years to good psychiatry and good medications. though she still uses it to get her way... I am working still on that one.
I can sooo understand why people who have issues they are working out themselves that choose the Psychiatric profession.
If it would help, get a textbook and do some studying.
How is your novel going? That might be very good therapy for you.