Hi Mary .....
So sorry about your facial pain ..... whatever the cause. I sincerely hope you can find relief. If it is trigeminal pain, I can sincerely relate to the "awfulness" of it!
I developed trigeminal neuralgia very suddenly 17 years ago (long before the AN). I can still tell you exactly what I was doing when it suddenly hit the first time. Blissfully, my family doc diagnosed it very quickly. He put me on Tegretol, with increasing doses to try to get relief. When the dose was so high I no longer felt safe to drive, he sent me to a neurologist. End of story (about six months after diagnosis) is the neurologist sent me to a neurosurgeon who did the microvascular decompression surgery (via retrosigmoid/suboccipital approach) at the brainstem to lift the artery and two veins off the trigeminal nerve that had caused the awful pain. I woke up pain-free and it has never returned.
I am not a doctor, but to my knowledge trigeminal pain is usually just on one side of the face or the other. The tri in trigeminal is because the nerve originates at the brainstem, but as it enters the face it splits into three branches (across the forehead, the cheek, and the jaw). My horrible flashes of pain were just in the upper two branches.
Yes, stress can cause any symptom to become worse and it sounds like you are dealing with several significant issues. Hopefully your docs will be able to determine the source and give you something to bring relief.
Many thoughts and prayers.
Clarice