Broken Kneecap (patella)

I broke my kneecap 4 weeks ago (via a line drive in a softball game) and just had it diagnosed a few days ago.
The first doctor gave me an “inconclusive” when reading the X-rays.
The second doctor (an orthopedist) took new X-rays, looked at them for 10 seconds, and said I had broken it.
He says my tendon is holding the broken piece in place so it should heal normally. Other than telling me not to do any jumping, he says there is nothing I can do for it to speed up the healing process. Does this sound right?