I did my normal 5k a few days ago and when I was nearly home, my left calf suddenly, and apparently without doing anything different, started hurting. I couldn't run but then I devised a peculiar step to let me run the few hundred yards home. It hurt for a few days, getting better. Today I couldn't feel anything so went for a run. I got a few yards from home and the pain set in. I massaged it, it still hurt and I turned to go home. Then I decided to carry on. It hurt all the way round my run,worse sometimes and not so bad at others. I had to c ut is short and I did 3.7K with a little walking thrown in. It was really painful at times so I don't think I should run until I've sorted it out. I think it may be a pulled muscle. It's in a particular spot in the back of my calf. So frustrating as it's my first proper running injury. Just hope it doesn't take too long to repair!
Oh well, at least I wasn't too far off 5K!