I was going to agree with this, I get it every year. It's bronchitis, just a non-communicable non-bacterial one. Whenever I get it, it's like a tickle in the back of my throat - is that yours? I'd say expect another month of this nontreated, but if you can get to a doctor, ask about benzonatate or, even better, azithromycin - that got rid of my cough in a DAY.