Just did W9R1 a day ago. Today I was 16 minutes into run 2 when I had an aching, dull, constant pain on the lateral sides of my shins. Progressed to the point where I had to slow down and walk the rest of the way. This seems atypical to any of the other more common types of shin pain I've read about? Does anyone have any pointers? Could it be anything to do with how I land? (I land on the outside half of my sole) .