Fortunately Michael is fine - I'm sorry it took me all day to post that update.
He just has a nasty virus that's going around, but his lungs and ears were clear and it isn't strep.
The trip to urgent care was worth it, just to know there wasn't something wrong that we were ignoring. No antibiotics necessary, but they did give him Motrin and I swear that stuff is magic. Harper was never very sick when she was as young as Michael and we never had Motrin for her until she was much older - it never occurred to me to look for infant Motrin. But Motrin helped us sleep and nap and sleep some more!
Everything looks better after a little sleep.
Of course Matt and I are now feeling the cold come our way, but I guess we won't wake the children up throughout the night as retribution. That would be pretty cruel.