Are you still quit? If so, congratulations! Most quitters would probably agree that the first 3 days are the hardest to get through. And the last time I went through them I would have agreed: I remember going through some serious withdrawal symptoms in those first 3 days.
Whether you had it hard or easy, though, if you’re still free on January 3rd, you’re doing great! Every day should get a little easier from here on; every day, you should feel a little more “normal” as a non-smoker, a little more comfortable in your new role.