Hang in there! Some days will be easier than others, but improvements to your life will continue over time. 

This feeling is quite normal. Fight through it and see what happens. Most of the time we fail at things it is not because we do the wrong things but because we fail to do them over a prelonged period of itme. It Enver hurt noone to try something for 3months. There is no downside in trying to Change a bad Habit. If it isn't working outyou can still stop it after the detox.

Good Job on the decision. This commitment is what qualifies you to be awesome.