Hi there, Three days ago now I had any injection in my arm and it is still sore to move, there is also some swelling and heat were and around the injection was done and lastly the is redness which is increasing/getting bigger I'm concerned as I have never had this before when/after I have recived injections I'm probably over reacting but I just want to make sure. Do you know what this could be and if it's bad/serious? Thank you!!