HIV questions post in the HIV community
I would wait three months and then if that is negative go back in another three months to be extra sure. But you should know that it is very hard to spread HIV through oral sex. In fact there have been a lot of studies on it and they did so many tests where they were unable to find transmission of HIV through just oral. Even if there is a break in the skin or blood is involved, I read somewhere that it has to be a decent amount of blood and big enough wound for the infection to get into the blood stream, and that is only if it is still active after hitting the air and etc. HIV is a weak virus that needs perfect conditions to enter the body and blood stream.
A hotline has to tell you there is risk because of legal purposes, and I'm not saying it isn't possible, but it has been shown to be less of a risk then sex without a condom, obviously....somewhere on here you can find articles about the studies they did. They have never had a case of HIV being transmitted through oral sex. Think of how much bigger the number infected would be.
BUT...it's always good to be sure, and get tested for peace of mind.