well ive had the same symptoms as well. i just started smoking a lot more heavily (about 3 times a day) and for about two weeks im had a cough. it was pretty bad at first but now its just like i can make a pretty nasty cough whenever i want. its like there is a bunch of mucus in my throat all the time.

and secondly, last time i smoked i felt like i was going to have a heart attack. i just noticed that i had a terrible pain where my heart is and it spread all over my chest. then my wrist started to hurt. i just had to calm myself down and i was fine. but it was pretty carzy.