Welcome to the Forum!
The Endocrinologist can set you straight, if he will. You should also consider a Nutritionist, both of which needs to work with you as your "
Diabetes Team".
In the meantime do a tag search on "Carb Counting" and "Advanced Carb Counting". Carb Counting and a bolus insulin injection, for the carbs, will help you a lot. It works for many of us every day. Good Luck!