I just had knee surgery (lateral release) 6 weeks ago. I was doing really well with my recovery/PT and have been so cautious. That is, until about an hour ago. I slipped on some ice as I was going into the house. I had a really hard time getting up and it is hard to walk on. I took a Percoset and iced it down. I just really hope I haven't messed up what I've worked so hard on. Should I be worried?