Sorry, late to the party on this one.
But hope I can help.
Won’t happen. No risk.
Background Hep B can be found in salvia but not at the levels required to transmit.
Also the virus needs a direct route into your bloodstream. Oral sex does not have that access.
I have recently been involved recently in some meetings with some escort unions as well as some charity hep B support teams. Interestingly the subject of oral sex came up and nobody has ever seen anyone catch Hep B from giving it receiving a blowjob.
Sorry about the other comment. If you would like to discuss your other risks please ask away but for sure no worry about Hep B.
Gotta love these questions. So why get a blow job from someone with hep b. Not worried about hiv, herpes, hepatitis c, aids?
I m guessing it was worth it at the moment and regretting now?