As is said above, you can't get HIV from oral sex. Air and saliva inactivate the virus. Giving or receiving, it makes no difference. You did not have a risk. Use condoms for penetrating anal or vaginal sex and don't share IV drug needles and you'll never have to worry about HIV.;
Your symptoms are unrelated to HIV, please see a doctor for your concern.
Receptive oral sex is not a risk for HIV transmission, there are no 2 ways about it. No one ever has been documented to acquire this virus in that fashion. Please move on.