If it is more than 100...considered high...
U need
HbA1c( 3 months average sugars), urine routine tests to be done initially..
Type 1 is a condition in which our body cannot produce any insulin, so completely dependent on insulin injections
Type 2 is a more common and familial
diabetes seen mainly due to obesity ..
U can have a c-peptide level done to have a clarity..
At ur age, this can be MODY also