I'm 16, 5'4" and weigh 135 pounds, i ate so much food today because its CHRISTmas and we have so much good food ya know, but i have been trying to lose 15 pounds but i cant get my weight even to budge, and right now i am even fatter because of my period :( I exercise 5 times a week (dancing, walking, running) i hardly ever sit down unless im eating or on the computer, so how many calories should i be eating a day, i eat healthy food btw. I feel really fat! i kind of want to make myself purge right now i feel so fat :( help me lose 15 pounds please!