Why am i so thirsty?????????????????????????????????…!
Answers:
I agree that you should be checked for diabetes (the "fasting" test is most accurate) since one of the symptoms of that is increased thirst.
Since your weight is not high (in fact, kind of low), you probably don't have Type II Diabetes, but you could have Juvenile Diabetes which is more serious--and the sooner you control it the better.
The shakiness you're feeling could also have to do with your "sugar" levels and could be "hypoglycemia":
http://www.google.com/search?q=hypoglyce…
Thirsty could be a sign of diabetes... you don't have to be overweight to have that.
You may have diabetes.