Hi Jenn, Do you have someone to talk to concerning how this is affecting your life? A supportive therapist, perhaps?
CRPS affects the limbic system of the brain.
If I start to have too many difficulties with insomnia, pain and mood regulation, I ask for help with mood stabilization. For me, this usually means low-dose Depakote. Some people are already taking a mood-stabilizing med when taking gabapentin, lyrica and other AEDs (anti-epileptic drugs).
It's really important, Jenn, you have a neutral/supportive place where you can let go with feelings about how this is affecting your life. Meds can help with mood-stabilization; yet, it's important you aren't just stuffing or numbing your feelings with meds. Find a way to release them in a manner which hurts nobody.