I Have Been Experiencing A Non Productive Cough, Pain In

I have been experiencing a non productive cough, pain in my mouth kind of like a burning feeling and a slight skin rash for 5 weeks and two doctors said it was probably just a virus and it would go away the 3rd doctor gave me antibiotics for the cough and an antiviral for the sore mouth which never helped. I think I might be having a allergic reaction to the diclegis that I haven been taking for the last 5 weeks.