question: Hi I had a cough in the beginning of the summer.  I felt really sick.  A few other people I knew were sick as well, while others in my family did not get sick.  I continued to have a cough for the last 3 months.  I do feel like this is usually allergy related and it feels like an allergy attack.  I have never has them like this though.  Now when I cough I have a metalic taste in my mouth. Could this be TB, or a lingering infection or asthma(not known to have this)