Hi Rosemarry, I think it depends on the exact nature of your cold/flu. If you have a productive cough and chest congestion, they can be reluctant to do the EPU because of the risks it poses with regard to the anaesthetic. It will be best for you to discuss it with your Dr or clinic to find out their specific requirements/conditions. It would be terrible to turn up on EPU day and be told you can't do it. The antibiotics should not be a problem because many (American) clinics prescribe ABs as part of their standard IVF protocol. It could actually have some benefits for some women.
You may also want to consider if you want to proceed with a cycle if your body is potentially run down and not at its best? Some women are happy to proceed, but others worry it will limit their chances at success. I've gone ahead with a cold in the past (in a cycle that was also back-to-back with the previous IVF) and was then sick for 3 months after because my body was so run down by the end of the cycle. In hindsight, it was the wrong decision for my overall health, but I don't think it had any bearing on the cycle outcome.

J.Bear, FX for you, hun.