Apparently Saturday's victory while fighting a cold wasn't enough to tucker you out yet.
Probably should have been a rest day but been feeling guilty about (lack of quality) training due to being sick the last little while.
Still fighting the cold, or have a new one, still congested. Ugh.
Races aren't the best thing for our immune systems. I'm fairly confident I would have been over my cold now if I'd had an easy weekend. Oh well...