What do you guys think my sickness could be?

I've had a bad cough for 3 weeks now. The first week when I got a fever I took dayquil until it was gone, then got the cough again. The 2nd week when I got a fever I went to the doctors and got antibiotics. It brought my sickness back to a mucus filled cough and it still won't go away. The doctors is too... show more I've had a bad cough for 3 weeks now. The first week when I got a fever I took dayquil until it was gone, then got the cough again. The 2nd week when I got a fever I went to the doctors and got antibiotics. It brought my sickness back to a mucus filled cough and it still won't go away. The doctors is too expensive, so I was wondering if anyone had an idea of my issue.
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