I had a total knee replacement. My toes are now seriously curved under like hammer toes (except large toe) experiencing serious swelling foot/leg now?

DVT??? I do hope that you have already called your Orthopedic surgeon. It's impossible to help you thru this venue, however, one of the potential complications (and I am sure that you are aware of this) after Orthopedic Surgery, is a DVT (blood clot). Although we use blood thinners post-op, there is always a possibility of a DVT, so PLEASE contact your Orthopedist immediately for further advise.