Im going to the doctors soon,but I want to hear your opinions too.I was prety weak,so I started running 6 months ago.I started getting knee pain and cracking noises,so I stopped for a month.My right legs stopped hurting,but my left leg kept cracking and making noises.I started light squats with no weight and I worked my way up to 150 squats with no pain.Then I took 2 weeks rest and the pain came back again.Now both my legs make noises and I have different kinds of pain.When I do a half squat I feel very light pain and I feel small popping noises.When I do a deep squat I feel a very sharp pain right in the middle of the knees,so I stop.When I strint i feel pain at the ligaments on the outer part of the knee.If I put my finger on my knee cap while moving it I feel its rubbing.The weird thing is that I only feel symptoms when I extend my knee.When I retract it i feel ok.