I completed W4R2 last Tuesday but was aware of a sharp pain on the inside of my knee each time I started running... nothing much though. I got home, did my stretches, and within 20m could hardly put weight any more on my left knee for the pain and the feeling it was about to give way!
By the next day it was better, but still hurt, not only on the inside of the knee but under it too, so I saw a physio who told me that it was overuse. Booooooh! So now I am doing some stretching exercises (it appears that when I sit with my legs flat in front of me my left knee is higher than the other) and some strengthening exercises for the quads.
I'm really frustrated as I felt I was getting the hang of things! Am taking a week off and then if it feels ok shall start slowly, but I must stop if it begins to hurt. Yesterday I also had my feet checked and bought new shoes - and found that my old ones from a few years ago were not actually correct - apparently I'm a neutral runner, and they were for overpronation, so this may have aggravated the problem.
Am itching to get back to running! Wishing all of you good progress this week - I shall be following your blogs even if I can't run!