I'm due to attend the royal parks 1/2 in 2 weeks, bee plagued with niggles all the time I've been training, but tended to just carry on.
I was having a bit of grief from my left hip and always have a clicky knee, but nothing I couldn't cope with, however, i went out on Monday, 3.5 miles or so into the run, I had a little twinge.
Carried on as I'm now 1/2 way to gym, when i got to the gym, had a little sprint (ish) to finish, but within about 30 sec's I was in agony. Yesterday noticed knee was swollen to almost double it's size....
I'm booked in for a sports massage and hitting the foam roller hard, I'm still hoping to run the 1/2, but interested to hear from any suffers.