coughing

Okay preggie people, I need your advice! I had a cough for two weeks so I went to the doctor and they diagnosed me with bronchitis. They prescribed me with a zpack. I took all of it for recommended time and a week later I'm still coughing. Now I've got a headache and more congestion. It's hard to treat since we can only take so many medications. I don't have a temperature but I feel like I'm getting worse. What do you all think??