I quit smoking and had alarming symptoms for the first three days....after that, gradual loosing of the grip of nicotine.
Three days are the worst. After two weeks, the nicotine is out of your system. Then, it is a matter of changing your habits to avoid former smoking situations.
A glass of *ice* water is a good substitute in the interim.

Short walks are helpful.
Think of this.....John McCain spent *six years* in a pow camp, part of the time being tortured! Can't you spend three days then two weeks without smoking? After that the chemical is out of your system. A brand new like awaits you, a much better life.
Have a mantra, a better life, a better me.....
Good Luck!