Saw the physio today, and the problem was my medial ligament. I slightly pronounce on my right foot ( not enough to get a special pair of running shoes) ans this has caused the problem with the ligament.
I have exercises to do to strenghthen the muscles arond my knee and legnethen the ligaments. I have not to run this week but to run next week. I have to go back to running 1.7K eveyother day and see how my knee is.
So good news is my knee will be fine with a little fine tuning I'll be running again real soon.
I'm so happy
