I am 29 years old, female, 5'11" 180lbs. I have been diagnosed with a generalized anxiety disorder and quit smoking about one month ago. For the past week or so I have been feeling a lot of "flutters" in my chest, and a feeling of excess phlegm in the back of my throat. It feels like I have mucus in my chest, and that is what is causing the fluttering, but I have also had heart palpitations quite often (hence the anxiety disorder diagnosis).