My heart goes out to you. You had this surgery to restore your life, not lose more of it. For what it's worth, I'm siding with your husband: you should make an appointment with your surgeon to see why you are not doing better. If there's a problem with the implant, you need to find out. This is your body and your life, so leave no stone unturned in making it right, or at least as good and pain free as possible. If your surgeon cannot give you an answer, find another surgeon who specializes in problem knees, one who does revisions, and see what that surgeon has to say.