I would advise you to get a serum IgG
& IgM test for herpes
right away! This will help quell the doubt & tell you if the herpes is indeed present & if so, if it was of recent onset.
The painless bump could just as well be another viral infection called viral warts
as could the blister
Am sorry but dermatology is a 'visual' field & it would be great if you could upload a clear digital photo of the region on this web site.
Should you desire discretion, please feel free to use our premier 'ask-a-specialist' feature & get directly in touch with me.
In the interests of public safety & yours, please do practice SAfe Sex!
Cheers & Best regards!
Dr Praveen Rodrigues MD
Dematologist, Cosmetologist, Venereologist