Thanks for your reply.
I really don't know what to think.... I read about MCL and torn meniscus, but the symptoms are a bit different.
Like I have no swelling. But when I forget to turn my foot while turning my body (so twisting my knee) I feel a flash of pain....and afterwards I have a throbbing sensation at the outer side of my knee.
Went to the doctor...but he can only see me on monday, I will be travelling for work on sunday so no chance to see a doctor till after my travel...more than a week from now.
I will give the stationary bike a try and see how it feels.
Thanks again for your reply.