Yes, being on suppression will delay seroconversion some and if I thought this was a big risky situation, I would suggest that you stop the suppression but I really doubt that it is. If you would feel more certain, you could stop and retest at 16 weeks but it just seems so unlikely to me.
Thanks for clarifying the location, I understand and correct that is thick skin also. The nipple, because it is thin skin, can be vulnerable to HSV infection but the area you describe? Not so much
Terri