Well, since a few days before I did the half (two weeks ago) I've been having some soft tissue pain under the patella on my right knee. I was sort of hoping it would go away by taking it easy during my rest days (yes, I know it sounds stupid, but I didn't want to miss training).
So the day after I did my 3k TTs last week I got the same pain back again. I've been resting since then, including missing my long run at the weekend, which I was looking forward to. So I'll probably give today's run a miss too and see what the physio says tomorrow. As luck would have it, I've caught a head cold too, but at least it's at the same time as my knee injury, so it's not stopping me from running.