I'm so sorry you had a bad night. It is so strange how our knees will do what they want to do when they want to do it! No explanation at all. It just misbehaves. I am sure going back to work is weighing heavily on your mind. I don't know how you can do it. I couldn't handle working yet, and you are behind me in time out. Of course, you are younger and it sounds like in better shape than I am, so you just might be OK. I pray you will. Me, and a whole lot of other people on this forum! We are all family.