Hi. I'm 14 And I Have Bad Knee Pain. I

Hi. I'm 14 and I have bad knee pain. I play gaelic football and had a bad fall over the summer. I had physio and he told me that I had done damage to my patellar tendon so I had physio until that healed but now I'm still in pain when I am sitting down or going up and down stairs. Help would be much appreciated.