I am experiencing knee pain, difficulty walking, knee swelling, and knee injury as a result of fainting. it hurts to stretch or put any stress on my legs on both sides?

Knee injuries: You may have sustained contusons of both knees, but the presence of swelling is concerning and, I feel, warrants an evaluation preferably by an orthopedic specialist so that appropriate testing, treatment and follow-up care is obtained. Traumatic bursitis with effusion, linear fracture of patella or other bones, bleeding into the joint are possibilities.