My doctor has made a big deal and classified me with gestational diabetes, but I didn't fail the glucose test I was just really close. Why?

Pregnancy & Diabetes. Pregnancy has way of altering glucose metabolism and Insulin sensitivity made worse as the pregnancy progresses. You may not have gotten an "f" on the test but you may have gotten a "d" which can affect your fetus. Please heed your OB md's advice.
Other factors. Must be in his/ her mind. Total weight gain, baby's size, family history must have your doctor concerned. Please ask.