A PCR can be done from anything, even completely normal skin. the trick is getting a provider to do it who understands that. yes, the yield is far better from an actual sore, but we’ve recovered virus many times in our research study from people who have no symptoms and are doing swabbing as part of the study.
In terms of medication, if you are concerned about infecting someone else, you could do that or if you are concerned about having an outbreak, you could do that. Or you could certainly skip it if neither of these are worrisome to you. Medication is not going to change anything in terms of you being infected, but you probably know that already.
I have HSV 1, my husband does, two of my three kids do, two of my four grandchildren do, it’s just so common and most often is oral – all is oral in our family. I take daily Valtrex and haven’t had a full blown cold sore since starting 18 years ago. it works like a charm but then I had frequently recurring cold sores and you don’t.