Vastus lateralis, vastus medialis Cramps

Did you happen to tweak your knee? My experience with a knee injury from a few months ago is that your brain will mess with the muscles around your knee to try to protect you from pain. I literally had trouble almost falling over because my muscles wouldn’t work the way I was trying to tell them to. I’ve read about runners literally falling down as if they had no coordination at all. And I noticed when applying pressure to them they were very sore.