Protected sex is just that, protected, so nothing to worry about.
Oral sex has been proved not to be a route of HIV transmission. The saliva in the mouth makes the virus inactive, not to mention their is no route to get into your blood stream. Many studies on couples where one partner is HIV +, and they continued to have protected sex and unprotected oral and their were no recored cases of HIV transmission. So although i can understand your concern, you really have nothing to worry about.
Hope that helps.