With the help of dayquill and the fact this was a getaway weekend for the two of us helped me be physically, mentally and emotionally up to the task . It was the infection issue that raised its ugly head.
Leaving it to others to answer the infection question, I question the timing of having oral sex when one has a bad cold as you describe. Usually the symptoms that accompany a bad cold would not be beneficial to making love in general, and would put a huge damper on the situation, whether or not infection is a factor.