Thanks for writing in.
You seem to be suffering from herpes zoster
.It is a viral infection.
So far you have been treated correctly.
Continue the treatment for 7 days.
Few new blister
may come for 4-5 days.There is nothing to be worried about.
The blister may rupture.Continue the application of sofradex cream.
You should be fine in a week or two.
Hope this helps.