Since both the knees got bruised, it is prudent to get X ray
AP and Lateral of both the knee joints. It was not wise to wait for a week. When the knee clicks routinely with no history of injury
it is normal.
But if it clicks following a trauma, it means an underlying injury. It can be a meniscal tear that needs appropriate intervention. If X ray is not suggestive, the Orthopedician might advice an MRI
Keep in mind that if there is indeed an underlying injury, any further mobilization will lead to more inflammation and damage and worsen the condition.
Remember knee injuries should never be ignored as it can lead to a chronic problem in later life.