I don't understand claws in the chest from not smoking. It's probably just your body trying to expel the crap built up over the years. Let it happen. It'll be gone in a couple days if you don't keep trying to keep it down with nearly every nicotine delivery system except cigarettes. Remember as well, you're not only stopping nicotine. There are many other things in analogs that give a different type of satisfaction. If you're expecting e-cigs to magically be exactly the same as cigarettes only you can stop using them more easily, then you're barking up the wrong tree. The only things exactly the same as cigarettes, are cigarettes.