Well, what is the worst possible things you can do after being sick for the majority of a week, missing several scheduled workouts, aaaaaand being on medication??????? The anwer is to try to participate in a team ride when the weather is in the low 20's. How do I know this? Because I was dumb enough to try it.
I knew I was in for a bad day when my heart rate was already in Zone 2 before I even climbed on the bike. I was able to have a fairly easy ride to RTC to meet the rest of the team, got there a little early but had time to have a nice tea to warm up. We had a group of about 8 that was heading West to pick up others along the way but I only made it to the OD Brewery turn off and just wasn't "feeling it". I decided to abandon at that point and head home, which turned out to be a good idea since I spent the majority of the day laying on the couch because I couldn't breathe from the congestion.
Oh well, lesson learned. If you are sick, don't ride (especially in the f'n cold)