In my experience, the first week will seem like a mistake. Sometime into the second- or third-week things start to show a glimmer of hope that you made the right choice. I am 6 years out and I am so glad that I made the choice to have my knee replaced. I have not had any problems with it since surgery. The key factor is making sure to do your therapy but don't push yourself so hard that you set yourself back. Massage the scar to assist with breaking up the scar tissue (my doctor advised using lotion to massage). Motion is the body's lotion as well. When it hurts, move it! Walk around and you will notice it loosening up. I would wake at night with the worst pain, that's when I would get up and walk around the house until it felt better. This is what worked for me, and I hope that you are able to find relief.