Increasing pain

I have been diagnosed with osteoporosis arthritis in both knees following x-ray. R knee is worse on x-ray and I can’t straighten it fully, however I have a very different pain in left knee. It’s a sharp stabbing pain when I weightbear, is this normal? I’m not sure whether it’s attributed to deterioration of if it’s injured through uneven gait due to arthritis. All advice welcome.

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