what your getting my friend is called a panic attack, i have been getting those for years before i ever lit up my first jay. its extremely discomforting indeed. i have had them on pot as well, but now i use it to cure my attacks, and help to take the curse off. any how you must not think about them, and if you do, then you must to crush those thoughts with all your might. reason with your self that nothing new or bad will happen when you smoke, providing your out of harms way to begin with. also i find that with panic attacks it seems only a few puffs to get you a little buzzed is all that is needed to melt the feeling away. anymore and you might help to increase the feeling. i guess the bottom line is try to keep a leveled and logical mind. these are some things i do, and by no means are they going to work or not i have no idea, but i hope this helps some how.