If the wound is odd in anyway what so ever i.e lots of puss, large amounts of redness, smells funny, dark lines going up your arm go to an E.R. also if you feel odd in any way i.e. sick, tired, malaise go to the E.R. With you being on dialysis i do not know if they can treat you with a large amount of antibiotics. I know you are going in on Monday but things can go from bad to worse quickly with an infection so do not "man it up" in this situation.