I get a tickle in the back off my throat every day and it causes a coughing fit so bad i usually vomit if i have ate within a few hours, otherwise its just a bad fit that leaves me gasping for air, this had been going on for about a month now. Any idea to what it may be ? Also i am a smoker but actually quit exactly 2 weeks ago, and haven't smoked since, but like i said this had been going on for about a month now.