I had a three day work trip planned in mid September, prior to me leaving my wife got pretty sick (cold/flu like), but I hadn't. I figured I'd go on the trip and all would be well when I got back. About two- three hours down the trail I noticed I was sweating more than I should have been and soon got that bad feeling when you know you're getting sick. I made it into the lake I had planned on camping early evening, feeling off, but not terrible. The next morning same thing, off- but not terribly so (it was cold too- really hard frost, probably high 20's!). I had to re-trace my steps about five mile before turning for my next night's stay. As the morning wore on I was feeling a little more sick, when I hit the trail junction I was really torn- head back for the truck or keep on. Part of me said to press on that I didn't feel that bad, the other part of me reminded me that my wife's illness got bad enough she missed two days of work. In the end common sense won out and I headed back for the truck. As I drove home (three hour drive) I progressively got sicker and sicker. By the time I got home I was full blown sick, sick enough that I ended up missing a couple of days of work- had I pressed on, it would have miserable.
I did however thoroughly surprise my wife that common sense had won out! :)