As much as I am against Antibiotics from the damage they did to me this is my advice. You dont want to mess with your health. If you are sick and not getting better take the Antibiotics . You dont want to get pneumonia and things will get very bad. Just make sure that you supplement with probiotics. Looking back at my experience with Antibiotics I really didnt start to get bad until I did a few courses (2 weeks at a time) of BROAD spectrum antibiotics... These are what put me over the edge.
Again. Dont mess with infection. Listen to your doctor and just be smart about it. If the antibiotics do not make you feel better after the first course, question your doctor. Ask for more tests etc. Listen to your body.