If gabapentin is effective but side effects are an issue, you might see benefit from pregabalin (Lyrica). I had similar issues with gabapentin brain fog at the doses I needed for a cervical spine injury.

The description my pharmacist gave when I talked to her was basically all the good stuff turned way up, side effects turned way down.

I'm on high dose of pregabalin now and it's been life altering.

I'm watching this potentially also, but in the meantime I'm at least functional.