Brain chemistry can be messed up due to dietary issues, lack of exercise, the works. Improve any of these aspects, and it's incredibly likely the rest will fall into place - after which, it would be an easier time figuring out the specific medical professionals to assist her. Dental's much easier, however, just don't go to the shady places.
I should know, I come from a long, long line of medical and psychological professionals, uncle's a dentist, so on and so forth, and I have incredible heart issues in the form of arrythmia - but I could also be making all of this up for the sake of assisting Pippa. Either way, I'm autistic enough to do all of the busywork regarding physical and mental health, even as a bystander.