Technically, I'm only partially overweight, according to the BMI chart
. Anyway, I've had friends your height who weighed 90 pounds
, and they get sick very easily, and when they get sick, it's bad. Your body will start to shut down because it cannot support itself. The average weight for your height is at least 110. At the very least. Remember that you are wonderfully made, and that you are beautiful! 90 pounds is sick, not healthy, and healthy is beautiful.