How to deal with anxiety?
Sorry I keep replying to everything you post like some kind of annoying know-it-all! I'm really not, I think I'm just getting to a phase in quitting where it's super-helpful to me to share with others. :) Exercise has been my saving grace since quitting. It is the only surefire way for me to relax now, and I have been doing something or other every single day to chill myself out after work, to the extent that I have actually lost a bunch of weight instead of putting on the usual snacking pounds. (Which, side note, is really nice, because although people cannot see that I have quit smoking, they can see how fit I am getting and when they comment on that, I know what they are really complimenting me on is not smoking!)
Years ago I busted an ankle and took up lap swimming, which I cannot say enough good things about. Have you tried it? It is really healing when you have an injury and extremely relaxing, and they even make waterproof MP3 players now. Most gyms also have a sauna that you can sit in with a magazine afterward for the ultimate calming experience.
But of course there are all kinds of anxiety-inducing situations in which exercising right then and there is not an option. Folks on here will tell you that in those situations you have to remind yourself that smoking will not do anything to calm you down and will actually make you more tense, both by physically upping your heart rate and by making you mad at yourself.
Also, you are still SO early in quitting. It is likely that what you are feeling will pass in a few days, although I know how endless that time can seem. Just remind yourself that you are getting better and stronger every single day. :)