how tall are you, and how old are you if you don't mind me asking.
also, do you know why you are underweight?
and how much do you weigh now on your 17th day?
I am 5'8 and 27 years old. I have been underweight 115-120 lbs for the last 6-7 years. I am naturally on the thin side but I have absorption problems caused by high doses of flagyl (metrodinazole) and iodoxin when I was younger.