I am taking warfarin for afib . I fell the other day directly onto my left knee . Swelling began almost immediately. I went to er. They did X-ray and said no break anywhere. They said my swelling was due to my blood thinner. At this point, it has been 5 days with little improvement. I wasn t told to follow up with anyone. I was wondering how long I may have to deal with this and is there another doctor I should see?