You got your GTT done at a time when there was no communication between the embryo and the mother. So it was like a GTT for a person who is not
pregnant. Interpretation will also be the same ; that means it is a pre-existing
Diabetes, not Gestational Diabetes.
But the second part of the story is confusing.
Please get your Blood
sugar Fasting and PP done, observing due precautions. Then you should seek a consultation with a General Physician or a Diabetologist.