Thanks for writing to HCM
Your history suggests you should go for MRI
scan of your knee joint as it is the choice of investigation in suspecting soft tissue injury
X-ray knee joint AP/Lateral should be done routinely to exclude bony injury.
MRI can detect ACL/PCL injury and meniscus
Mild to moderate cases are treated conservatively whereas severe cases need surgery.
Of course you need proper clinical examination by orthopaedician.
Get well soon