Thanks for your query.
From description , it seems you might developed soft tissue injury
to knee. .
Now after several weeks if pain is severe ,I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management. You may get the MRI
of the area affected under his/her guidance.
Meanwhile you can take anti-inflammatory drug like motrin
to reduce pain and inflammation. Avoid putting weight and rest well.
I do hope that you have found something helpful and I will be glad to answer any further query.