Oral sex is not a risk for HIV. The only way adults get HIV is from unprotected vaginal or anal sex where penetration occurred or sharing IV drug needles. The HIV virus is very fragile and is inactivated by air and saliva. So, the only documented and proven cases of transmission involved unprotected vaginal or anal or sharing IV needles. You did not have a risk at all and can move on without fear.
Non existent. No you don't need to test.