I have a persistent cough,more than three weeks. no chest/lung congestion. My throat has spasms and I can feel it pulse to tighten, but it doesn t really close. It is enough to notice it though. I was given Benzonatate for the cough and Prednisone, but it really doesn t seen to be getting much better. if it is, it is very small. the office says if may be some type of virus. What kind of virus would do this and how can I kick it faster?