Bumped knee below knee cap. now have worsening pain when bending or attempting weight bearing. no swelling. whole leg aches?

Contusion: If this just occurred in recent days, you most likely have a contusion of the patellar tendon, infrapatellar fat pad or simply the soft tissues on the front of the knee. This tends to be a very sensitive area that is under tension when the knee bends Consider limiting painful activities, ice for 20 minutes 3-5x/day, and use ibuprofen/naproxen to relieve inflammation. See a doc if not improving.