I believe some of Sarah Ferguson's issues can be attributed to her struggle to be what she is not.
In her official portraits, she is dressed up and posed as a red-haired Grace Kelly. No teeth showing, ethereal, mysterious, private, inaccessible Princess Grace of Monaco.
The real Fergie is readily-accessible raucous earthy woman who lives life out loud - she's Enneagram 7.
Sarah reincarnates the red-head Lucy Ricardo, queen of the sitcom.
A static portrait ill-serves Sarah who is always in motion.
She might find embracing her true nature, and a consistency between her public and private images, as a way to "get on with it".