Extreme pain in interior right side of left knee. Had xray 3 weeks ago and nothing showed. Dr said should go away in two weeks but it has not. Any wieght bearing exsercse makes it worse especially bending or kneeling. Staionary bike ok however.

Might need MRI. You may need an MRI to determine if you have a meniscal tear. You may also have medial plica syndrome.
If . If you are in a managed care or "rationing plan", good luck getting a referral. You don't give much specifics but this is clearly affecting you to a significant degree. Based on the severity of pain described is it likely that you will require an MRI of the knee and potentially an arthroscopy.