Knee problem Q

My knee has been really strange this week after an uncomfortable twist grappling. I keep on getting a strange feeling just by the base of the kneecap, almost like a small shock, or like my pants are sticking to the skin. No real swelling, although it feels like the skin under the kneecap is softer/looser than the same place on the ok leg.

No real pain, although sometimes uncomfortable.

Does this sound familiar to anyone? Any ideas?

I'm worried about squats, and also about plans to go skiing this weekend...