Three Weeks Ago I Smashed My Kneecap After A Mountain

Three weeks ago I smashed my kneecap after a mountain bike spill. Right after I could barely bend my knee. I nos have more range in the leg. I can extend completely and can bend to a 90 degree angle but more than that the tightness gets too unbearable.
Ortho says maybe meniscus tear or maybe just a contusion, but the lump wasn't this visible due to swelling until a week ago (a few days after my last appointment). It is a hard lump that changes size. Sometimes it's golf ball sized, sometimes larger. I have a follow up in 2 weeks but am really hoping I heal and do not require a costly MRI. I can walk without crutches finally and do so without pain on flat terrain. Stairs are getting easier but there still is pain with bending weight.
Pictures. Lump is right above kneecap: http://imgur.com/oUEhHoW [1] http://imgur.com/IKXFrMv [2]
Any input? I'm getting antsy being out of the mountains! Thanks so much!!