you could try taking....devils claw..also vitamin b complex b12..daily..and a good multivitamin..the b vitamins help mend damaged nerves..you could also try st john wort and valerian to relax your nervouse system..
You should speak to your gp, there are some specific drugs which can help but they have a lot of side effects. Bizarrely, some anti depressant drugs are used for nerve pain, such as amitryptiline