Pain, back of knee?

daniel7121

I recently started walking and lightly jogging to get some cardio into my routine. 30 minutes or around 2 miles a day is what I was doing. But, the one day I decided to really stretch before I took my walk, I got a really bad pain on the back side of my knees. Almost felt like a ligament was being overstretched. I could barely walk on them to do my daily activities. I found this weird since I had stretched before starting.. Anybody had similar experience, any remedies? Thanks!