Did you use some form of weight training and body sculpting as well as weight loss? Otherwise I would think that your body has gone through a state of shock and now there may be areas that not even weight training and toning could be eliminated w/o medical assistance. Are you healthy too? Are you content being a size 2? I am a size 16, was a 14 and I know it is strange to try on clothes that I once wore and then next time after weight loss they are way too big. Then I donated my big clothes so that I would never be tempted to ever fit into them again. Is your weight healthy for your height. it just seems like to go from a 14 to a 2, would mean that you are now a twig or that you were always a beautiful, petite figure that was waiting to blossom from your layers of protection(dress sizes) and are like 5 ft 2 + or _ a few inches in height? Therefore a size 2 would be appropriate
Good Luck, and see your physician if you haven't already been working with a dietician, they may need to run blood tests or thyroid tests to make sure you are not ill or anything. I care too