First congratulations on being a survivor, excellant work!
However, your wife is most likely living each day waiting for the other shoe to drop, so to speak and it is catching up with her.
Yelling at someone that is depressed won't help, trying to talk to her is a calm even voice that is real, will. Let her know how you feel about the future. Get her talking to you about how she feels about the future.
Then talk about the present, the now. Talk about living in this moment, here. Introduce her to mindfulness and meditation. If she refuses, you actively do it, she sees you becoming more focused and centered...
Plant the seed, then talk about doctors.
Best I can give not knowing your wife or you. Hope some of this helps you.
Stay strong and proactive
Be still and know there is Peace.
Kabir says: "Student tell me, what is God? He is the breath inside the breath". from the poem Breath.
DX: reverse Trigeminal Neuralgia;Cluster headaches; Atypical face pain; raynauds;complex PTSD; recurring MDD,disassociative disorder;