It won't go back. I think that's what's happened. Your ligament is longer than it was two weeks ago. And because it's too long, your knee is less stable than it was. In a way, it doesn't matter why.
Instability is instability is instability.
That horrible word, resounding with all sorts of undesirable connotations, whether it be emotional, spiritual, or physical. And when it comes to the knee, it's a word that you hear a lot. But it's not that the knee is ill designed, necessarily. It's just that it has to put up with all manners of stresses and strains. In fact, when you think of it, the knee is very well designed-ingeniously designed.