Its very very unlikely to have a repeated attack of shingles
Probably you are suffering from post herpetic neuralgia
. Generally PHN does not last for such a long duration, still it is the first possibility.
You are advised to seek dermatology opinion. Meanwhile analgesics, methylcobalamine + pregabalin
could be of some help. Take these drugs under medical supervision only.
Dr. Ajit Singh
MD - Skin & VD