Oral sex is not a risk. There has not been even a single documented case of any one getting infected from recieving oral.
Irrespective of any "What-if" you add to this situation, it will not change the fact that you weren't at risk.
Please move on.
The only way adults get HIV is from unprotected vaginal or anal sex or sharing of IV drug needles. Oral is never a risk because saliva has enzymes in it that inactivates the virus. So, you have no worry from your exposure.