Ok, if you can twist on the knee without pain it shouldn't be your meniscus.
Probably over did the intensity of your three runs. Also could be a form issue with your stride. Or just onset muscle soreness. Multitude of options really.
If you're fine after tonight, doubtful that you have a structural issue. If there is soreness, the general recommendation is no high impact activities for 2 weeks. That's generally how long minor pulls and tears need to heal them self. Still in pain after a two week rest and you have something to worry about.