ITBS or osteoarthritis?

[Louisamith]

I am a 20 year old runner who has been experiencing lateral knee pain for about 3 months. It is a deep aching pain on the outside of both my knees - feels like its on the bone (although it hurts my right knee more). It does not seem to fit the diagnoses of ITBS as it doesn't worsen when going downhill and there is no swelling. Also, they both have started to make 'grinding/creaky' sounds when I feel them when bending and extending them. They also really hurt after I extend my legs after sitting cross legged for a while. Any thoughts on what it could be would be appreciated - thanks!