A cold is not great when you are running, but I can often keep going anyway. It could be with your cold weather that it just tipped you over the edge.
It amazes me that some people have running streaks that go on for years as they must get ill sometimes. I would expect that they do not always go far, but I'm not that committed. I try to listen to my body, but then sometimes I need to force myself to get out there. I think running is at least partly a mental challenge.
!BEER
RE: One of those days where nothing works