ah, you poor thing, I know the feeling and it’s the worst in the world (officially, I think – see Google).
Anyway, a couple of things I’d mention:
1) for some reason (and it might be chemical: again, see Google!) Annadin Extra or normal asprin has a better effect on neuralgia than Neurofen; sorry I can’t remember the details;
2) toothpaste for sensitive teeth (i.e. Sensodyne) rubbed into appropriate gums, helps;
3) better even than the toothpaste (which can cause allergies) for me, is an essential oil (i.e. tea tree, garlic – garlic, my favourite), diluted in olive oil; that worked brilliantly for me when I had excruciating trigeminal neuralgia a while back.
Sorry if spelling not spot-on today. Not a good day: scaffolding went up outside my home for roof repairs today.
Thinking of you and hoping you feel better soon – remember it won’t go on forever!