It appears that you have sustained injury to the meniscus of
Please get a MRI scan
done for the same, and post the scan
results are available, we can plan the treatment further.
Meanwhile before the scanning is done, your knee should not be inflamed. Hence ensure that, before the scans are done, your knee is in resting condition, else we will not be able to view the knee joint properly.
Also during swelling, do wear a stretchable 15 cm crape bandage.