theta,

This may not help at all but I'll mention it anyway. Back in high school, when I was struggling with my first serious episode of PCS, I was put on an anti-seizure med. First it was Dilantin (phenytoin) then later changed to phenobarbital. I had two years of settled mind and brain while I was taking the phenobarb. I had no noticeable side effects. I was not taking a large dose. In fact, I ended up taking half of what my neuro originally prescribed.

I ended up needing it again in college to help me with the stress of studies. It help me have a stable mood, too.

Just a thought. It would be cheap to try and at low doses is relatively harmless.

My best to you.