two other ideas to the already excellent suggestions above.

1. "Jaw pain"=TMJ/TMD. Get it treated specifically. I thought it had nothing to do with my PN, which shared some sx with yours. Turns out, it had everything to do with it. I went to a clinic and got the full roster of treatment: an appliance to prevent clenching, trigger point therapy (both bodywide and intraoral), ergonomics, PT, the whole lot. All I can say is, my PN mostly went away when my TMJ went away. Having TMJ at the same time as head and face neuro symptoms is very suspicious.

2. Get your vitamins. Prolonged alcohol consumption deplete B-vitamins.

Good luck!