Are you taking any medications for pain and swelling?
Since it has been two weeks and the swelling and pain is still there, it is quite possible that there is a ligament tear or meniscus tear involved. Since you have pain while bending the knee and not during straightening this suggests a meniscus injury. I would advise you to schedule an appointment with a orthopedic specialist as soon as possible. Meanwhile take rest, continue with the ice packs and take OTC pain killers for pain and swelling. Please remember rest and immobilization of the injured part is of utmost importance. Do keep me posted. Take care!
Did you ever find out what this was ? I have the exact symptoms