I honestly don’t think there is any need to be terrified!! If the lesion area of skin was gone, I think there is virtually nothing to worry about.
You could do a week or so of acyclovir at say 800 mg TID – it is quite benign and will not be activated if there is no virus present in your body so you really don’t have anything to lose. But the mode of transmission just isn’t there for you. Really.