Hi Herk_Man. Do you have any locking of your knee? eg. where your knee cannot bend or straighten and you need to shake it a bit to free up the locking. Usually if there is any meniscus tear involved you will have some locking. If you do not have "locking knee", there is a possibility that you may have bruising or "soft tissue injury" of meniscus. Have you tried some anti-inflammatory gel on your knee? Rest sounds good! And gradual return to running. Hope you get better soon!