I Recieved Botox Injections 5 Days Ago And Have Itching

I recieved botox injections 5 days ago and have itching and swelling at the site. I have had them several times before and never had this adverse reaction. I contacted the Doctor and he reluctantly gave me a prescription for hydro cortisone cream and Prednisone. I've been using both since this past Saturday and although it's slightly better, I still have swelling and itching. What can i do about this? I am very concerned.