The only way I found to beat cravings was to not give in. Stare it down and scream no at it. The more you do that the weaker it becomes. It's like one of those Marine moto sayings "pain is weakness leaving the body" , kinda manly corny but with some truth.
If you give in the craving will go away,obviously, but what will it be replaced with, not a good alternative to say the least. It sucks and its hard but the best is to ride it out, the more you do the less powerful they become.
wish you well , it is definately doable