welcome to healthcare magic,
from what you have described in your symptoms you might be suffering from arthritis
, would suggest that you would benefit from getting an xray of the knee done to see if arthritis is present.
if no features then you need to do an mri
to rule out other things like tendon or ligament tear,
masses or cysts compressing on nerve
causing you to feel the pain.
would suggest get reviewed by the specialist for further follow up and treatment.
wish you a quick recovery.