Good for you, drastically reducing your soda consumption will do wonders for your health! Having the caffeinated mints on hands sounds like a great plan.
I can definitely relate to experiencing sugar withdrawals - it sounds a bit crazy but it really can happen. Have you tried eating dried fruit as a snack while withdrawing? I love some organic dried mango when I'm craving something sweet.
Good luck kicking your habit, keep us posted. :)