Hello. It is difficult to comment without examination but judging from the symptoms of pain
in both knees, and the pain keeps migrating from one knee to another you might require blood investigation to rule out rheumatology causes. If the tests are negative then the cause of pain could be due to reactivate arthritis
(usually happens in only one knee), in which case it will subside on its own. For the time being you can take tab Durapain
after food twice daily instead of dolowin
forte. It might cause acidity
so continue taking peptard-d.