Welcome to HCM
I think you have developed Herpes Zoster
and not simple Herpes. Zoster is late reactivation of chicken pox
). After attack of chicken pox the virus lie dormant in nerves, and in states of stress, immunosuppression
there occur reactivation of virus and which manifest in form of zoster. I assume you have developed lesions on back only and these are not genital lesions. It is not communicable and you can have sex during zoster.
Herpes infection is caused by Herpes virus and it is a STD and is different from zoster.