Re: HIV concern. Never seen this scenario!
Hiya. Well hiv is not passed on by oral sex, and that has been proved over many years on studys with hiv + & - couples. The mouth has over a dozen emyzmes and proteins that make the virus inactive not to mention their is no route for hiv to get into your blood stream.
You could of course get an std, but as you have tested for those fingers crossed they come out negative.
I hope that helps.