Advice for knee injury?

I landed on my knee when tackled in rugby with no twisting just straight up impact. Thought it was just a dead leg but it was swollen for weeks (apparently synovial fluid). Saw a Physio who said it might be a bruised bone and did ultrasound etc. But it's still not right and I can't put any pressure on it or bend it fully although movement is decent and I can jog/ run lightly and usually I can't even feel it, just certain movements feel bad. Do I just wait and rest it? I'm currently missing sport because of it so any advice would be much appreciated.