As we discussed above, there is really no point in testing for
gonorrhea, chlamydia, or syphilis given your azithromycin
treatment since your last sexual exposure -- unless you feel you need to do it for reassurance purposes.
The risk of hepatitis is extremely low after only a few exposures of the sort you describe, unless your partner we known to be infected or especially high risk. And you are correct that as a blood donor, you can be sure he has had negative tests recently.