Bingeing, on healthy food, but still bingeing?

I have lost 21 pounds in 7 weeks through good old fashioned diet and exercise, and cutting booze out of my diet.Every once in a while, like today, I have a day where all of a sudden I'm just excessively hungry, and I binge on stuff like Yoplait yogurt, or cereal. This is good, healthy stuff, don't get me wrong. It's 100 calories, 0 from fat for each yogurt, and the cereal is Kashi. I get cravings for things like chocolate, cheesecake, pies, anything sweet and creamy and this is when I turn to yogurts. They have flavors like raspberry cheesecake and strawberry chocolate and french vanilla coconut. I quite literally had 7 yogurts today, 1 when I woke up, 3 in one sitting earlier, and 3 in another just now at 10 at night. I've never even seen somebody sit and enjoy a yogurt as much as I do. I literally savor each bite and scrape it out with my finger, my cravings for something sweet are that strong and I love it that much. Does anybody else have this problem, bingeing on sweet, but healthy foods, and how do you control it? Also, does anyone know if this could have something to do with lack of alcohol? I used to be a moderate to heavy drinker..and I used to be neutral to any and all sweet things..cakes and candies and ice cream were never part of my diet. I never went out of my way to eat them. Now I crave them on an almost daily basis, and I wanted to know if maybe it's because I used to drink so much wine and there is sugar in that and now my body is lacking it? I binge on yogurts and cereals because I don't buy cake and ice cream or any junk food for that matter. I bet I would eat 3 pieces of cake instead if I had that. I am a 23 year old female, 118 pounds, 5 foot 3, if that matters. Thanks.