You do not need to test again and in fact never did need to test at all . The only ways people get HIV is to have unprotected vaginal or anal sex or to share IV drug needles to inject drugs. Air and saliva inactivate the virus. Oral sex is not a risk. Her bleeding gums will not change that. No one in the history of HIV has ever been proven to get HIV from oral sex. So, no need to test or worry about that exposure.