Okay first what happen was i had the fever for

Patient: Okay first what happen was i had the fever for like 3 days. On the last day I decided to go to the gym and when i came back, that night I couldnt sleep my arms were very itchy. 2 days later I got a itchy throat along with congested cough and stuffy nose. And on top of that my whole body was itchy. I been itching ever since. I took benadryl but it only helped for abt 30 mins… I don’t know what it could be.. Please help.

Doctor: