Hi, well i brought my bike in for a tuneup, and apparently the guy changed the seat height cause when i went riding after i rode for about 2 hours on some hard trails my knee started hurting when i pedaled with my left leg. I put the seat back to where it was (or so i think) but my knee still gets these "pains". I've never gotten them before on my bike and i'm sure it's due to the seat change. However the pain feels like it's on the outside left of my left knee, not directly in the knee. I'm getting pretty pissed cause A) i can't bike like i used to and B) i can't run very well now with this problem. Anyone have any suggestions of excercises to do to stretch it out, or am i best off by seeing a doctor?