Reaction from TDaP shot

I had my TDaP and flu shot yesterday and now the arm I had the TDaP shot in has a red knot, is super sore and is itchy. I also have chills, nausea and a headache. I'm assuming it's a side effect of the shot. Did anyone else have an itchy red knot from where they had the TDaP shot? What helped? I've rubbed cortisone on and taken some Tylenol. I may take a Benadryl closer to bed time. Thanks!!