Hi, I am 5 foot, 3.75 inches tall and weigh 101 pounds. I know I am underweight, and feel uncomfortable with my appearance, i saw a dietician today to help with the problem and she instructed me to eat 1300 calories a day and gain .5 pounds a week. My question is, if I strive to gain 3-4 pounds a week (because I am going to mexico in 2 weeks and feel extrememly uncomfortable) would that be a bad idea? and when i am on vacation for a week, do i have to stick to the .5 lb a week as well or splurge because it is all inclusive?