I had to deal with something similar, and I think I would add a few practical advices (outside of my other advice):

- if psychotherapy does now work in first 3 months, than problem is somewhere else

- check sugar levels, diabetes.. it is often misdiagnosed with psychiatric problems

- if she has paralyzing fear, you should talk to good psychiatrist and get medication. Be careful what motivations he/she has, he might try to sell you expensive doses for long term.

- we had good experience with psychiatrist outside US. Most consulting was over skype

- MRI, blood test... usual general tests. Anxiety can be result of infection, head concussion...

- Phenibut is quick & cheap solution to anxiety and sleep problems. No side effects, but you develop resistance fast, so it can be used only once a week. It takes edge-off before proper solution is found.