I have a skin rash on my chest and forearm and sides of upper body and lower back. Went to doctor and was told a allergic reaction to something. Told to take Benadryl and prednisone. I got 10mg to take 6,6,5,5,4,4,3,3,2,2,1,1. Im 24 hrs into it with no relief... should I be seeing some improvement this early or am I just impatient?