Antibiotics treatment for Fever.

Hi Doctors, My name is Aman Sinha and I developed dry cough symptoms since last Tuesday. The cough worsened on Wednesday and I had mild fever (100.5 F) on Thursday and Friday. I met a doctor on Saturday morning and he prescribed Antibiotics for my symptoms. He also pointed out that my symptoms are more or less viral Flu. Is it appropriate to take antibiotics in such cases?? If I am suffering from a viral Flu, how can antibiotics help me as antibiotics are used agains bacterial diseases. Furthermore, he asked me to conduct a Typhoid test which in turn came out to be positive the CRP value is also 5.64. Now that Typhoid is positive, I assume Antibiotics is fine, but my doubt is even before the reports had come out I started taking Antibiotics. What if there was no Typhoid and it was just a viral Flu. Are the medicines appropriate?? Expecting a detailed reply.