You aren't screwed AT ALL. The assessment you were given earlier assumed that your partner was HIV+. After all, if we did not assume your partner was HIV+, the risk would always be zero.
As noted, you used a condom. As long as the condom covered the head of your penis during VAGINAL penetration, you were protected from HIV and had no exposure. You can't get HIV from someone giving you oral sex. That has never happened - EVER - and you will not be the first person.
You should stop thinking about this encounter and move on. You don't have HIV.