Hi, Thanks for using the HCM.
your symptoms are suggestive of some injury
has occurred in knee joint, better to take a knee X-ray AP and lateral view to know any bony injury, better to consult a ortho specialist urgently, as your swelling is increasing in size, there could be a bleeding inside joint.
Hope I have answered your query. If you have any further questions I will be happy to help. Thanks get well soon....