It will take awhole to get the want for pop out of your system. I craved and craved pop and gave in every 3-4 days to have one, treated myself.
Then one week I got fed up with giving into it, I just drank water for a week and a half straight and then I had a pop, I felt like absolute crud. It is now to the point when I go out if I can get water I do, I don't get water if they try to sell it to me in bottles.
It takes awhile to get the cravings out of your system. But trust me, you will feel better once you cut it out, just have to be able to will yourself through it. It takes a few times. When I tried to cut pop out of my diet before I'd get headaches within 3 days.