Sienna,
I don't mean to sound harsh, but I feel I need to be! You said "I've been doing the diet properly with small nibbles", LT is a Total Food Replacement, you cannot be doing it properly and eating ANYTHING!
Honestly hun, some people can't do this diet, and if you can't commit to it properly don't put your body through the ups and downs.
That said, if you really want to do this, you should try again. Stop worrying about how much weight you need to lose, and get through tomorrow and then the next day, and then the next day, and you will look great in 15.5 weeks.
Chin up hun,
Guen