Welcome to HCM,
You have suffered a severe Herpes Zoster
involving specific dermatome on side.
This pain is some time difficult to treat but there are many option available which you and your Neurologist
can try, I am sure your pain will certainly get better following are my suggestions:
1)Local analgesic:gel,or patch may help local anaesthetic
(Lidocaine ) Patch.
2) Systemic analgesics : NSAID or Opioid like Tramadol alone or in combination.
3)Anti depressants like TCA (tri cyclic antidepressants)or SSRI (serotonin re uptake inhibitors)
4) Anticonvulsants :Cabamezapine and many new one may help.
5) Local cold compress or some times hot fomentation
6) TENS: Transcutaneous Electrical Nerve Stimulation, stimulation of peripheral nerve
by electrical energy through skin.
7) Yoga and meditation
If you use these judiciously I am sure your pain will reduce considerably.
Hope you improve soon