Hi, you're little more than two weeks post op and this is the time when we all think we should be much better by now. The recovery from this surgery is a long process and it can take months to feel good. Its not only the issues with the knee itself, the swelling, stiffness and the like but its also feeling down, wondering why you've done this to yourself. I said to my physio that I was angry because all I'd done was exchange one pain for another. Her reply was that the pre op pain was getting worse but this post op pain would get easier. And she was right. So hang in there, take your med's on schedule, ice, elevate and gentle exercises. If your med's aren't working the maybe talk to your primary doctor as they can change to something more suitable for you.