You've probably been vaccinated for hep B, depending on your age and location. Ask your doctor to do a blood test to see if you have any immunity for it.
Oral sex has a risk - lower than vaginal or anal sex, if she's still infectious. I suspect that she was told she can stop the meds because she has no viral load, but I can't say that definitively. I don't know her situation.
Don't panic, and I don't know that you need to go to the ER. Just go to a regular doctor if you have one, or an STD clinic. This isn't a medical emergency, and you should save the ER resources for emergencies, like heart attacks and car accidents.
It can take 90 days to show if you've been infected, but you don't need to worry about that if you have been vaccinated. You might take the girl with you so she can be educated about her status. If she's taking meds, she's not a carrier, most likely. She probably had an active viral load, I would imagine. If you don't want to take her, she needs to have an honest conversation with her doctor about whether or not she's infectious.
So breathe, find a doctor or STD clinic, Planned Parenthood, etc., and go from there. If you need help finding one, let me know.
Here's some info about the testing - https://www.hepb.org/prevention-and-diagnosis/diagnosis/hbv-blood-tests/
Thank you for your response.
I'm 32 years old and I'm from the middle east. I think they us some form of vaccination in high school but I'm not sure if it was for Hep B.
She definitely still has detectable viral loads but it's been stable for many years at this point.
Unfortunately, I DID panic and I went to the ER. They did the blood test to see if I'm already immune to the virus or not. Then they gave me one dose of HBIg since all of my sexual encounters were within the past 7 days. They also gave me the first shot of the Hep B vaccine.
Given that the sex was completely protected, risk of oral sex is almost zero, and I got HBIg and the vaccine within the 7 day period, I think I should hopefully, fingers crossed, be fine..
Do you think I should stop worrying? I'm still worried a lot.