Fell in bathrm and hit my knee pretty hard. Bruising, swelling, redness, a lump, cant bend knee, only pressure on toes, nausea, a lot of pain. Broken?

Get x-rays. It is hard to tell if you may have broken a bone of the knee, injured a ligament, torn cartilage or just caused swelling. Anytime you have a hard time bearing weight after a knee injury it is a very good idea to be evaluated by a medical professional and have x-rays taken. If the x-rays don't show a fracture you may still need an MRI to assess for ligament, tendon and cartilage injuries.