I get chronic sinus infections. I had sinus surgery last October. I am now having my first sinus infection since then. For the first time ever I am on Omnicef. Since the first does (last night) I have been having wheezing and don't feel like I am getting full breathes. Will this stop, or should I go to the walk-in clinic since it is now Saturday? I hate the walk-in clinic! I can't sleep because I can't breath well laying down.