When infected with HSV, the nerves at the site of entry to the body are infected. The virus travels through to that particular nerve ganglion and potentially down each branch. However it cannot spread to other ganglions internally.
Hence if you receive oral sex and happen to be infected, then only the genital region is infected and this is where any sores would appear.
This is all academic for you as there was no practical chance of HSV transmission and lack of symptoms, particularly for a HSV free person, confirms this.
Do you already get, or have ever had, oral cold sores?
Either way this is essentially a zero risk event. I am totally surprised that a doctor would prescribe antivirals with out symptoms. That seems to only feed your paranoia surrounding infection. The antivirals cannot possibly prevent the virus taking hold in the body. That either happens at the time of the incident or not as the case may be.
There is also no need to take l-lysine tablets. These are not required and do nothing for the vase majority of people with HSV.
I am afraid your imagination has run away with you. You were not at risk for any STD.
Thanks for your reply but I'm a bit confused. If i was a recipient of oral sex, is it possible for me to get oral cold sores from the incident?
Also, I have never gotten oral cold sores in my life. The blood test I took 3 weeks back for hsv1 and hsv2 came back negative so my body wouldn't have any antibodies against the two strains of viruses.
Thanks for the information mate. Really helps to put me at ease.