When will my allergic reation go away.

Patient: I have been to the doctor suffering from breathlessness and weekness in my right arm and shoulder he said it was a reaction to medication i was on for back pain with which was anti inflammatory and a strong painkillers. it has been 3 days since i last took the medication and im still getting the shortness of breath and the weekness. mt doctor put me on low dose valium but once it wears off the symptoms happen straight away. when will this stop or should i go to the hospital and get a scan done im getting very frustrated with it

Symptoms: Shortness of breath
right side of face loosing feeling for short period of time
right ear tingling
right shoulder going week right hand going week
anxiety feeling in only the right side of my chest