hi all, been having problems with my left knee, was about 4 miles into a run and something felt sort of sharp on the inside of the joint, not particularly painful, but annoying! this seems to have improved but im now getting pain at the back of my knee and i seem to have no "pushing" strength i.e. i can do a single leg squat with my right , but not my left. Went to the doctors with the initial problem, she couldnt find anything wrong so refered my to physio, she also found nothing wrong! im not a hypochondriac or anything but i KNOW that somethings not right. any ideas???