At the GPs office - 46 year old woman with knee OA

A forty-six year old woman visits you for her regular check-up. 

She mentions she's been having a constant dull pain in her left knee. It's been there for some time and improves upon rest. At first the pain was sharp. Now it's become dull, throbbing and is constant. She works in a super market, sitting for prolonged amounts of time and lifts weights daily, when she has to move merchandise in the storage room. She noticed that the pain was getting worse during the worddays and better during the weekends. 

You're already behind on your schedule. What do you do?