Withdrawls are very much an individual thing. I was drinking nearly a gallon of vodka a day during my binges, and never went to the hospital to withdrawl, but I have heard stories of people who worked every day and drank a quarter of that having seizures during withdrawls. Keep an eye on it and thank your lucky stars that it isn't worse, and keep in mind that if you don't stop, it WILL get worse.
Stay strong, when you fight the urge and wake up the next day, sober and hangover-free, you will feel like a champ.