Kindly visit a hospital and consult a ortho.surgeon. you need more active treatment.

Actually  on these injuries of PCL avulsion fracture it is better to consider operative fixation with screws bcoz of your young age though it heals without operation. However if you end up not uniting the fracture properly then you can't turn back and say I would have undergone operation and it will be too late and too little

Need clinical examination

How was it treated previously? Please send the x-ray images and MRI films. You can visit me at the clinic in Gachibowli.