I've read all different kinds of suggestions about when it's ok to resume workouts after a cold or flu. I had a very nasty cold for 3 weeks, thought it was completely gone, & started back gently, first walking, then picking up the intensity a bit & also adding strength training. One full workout of this and a couple of days later, I got hit with the flu. It's now 6 days after getting slammed, and most of it's gone except for a slight runny nose. I'm afraid to do anything to aggravate this. What's been your experience??