Hi Bill and welcome to the forum.
If the diagnosis is that you have diabetes then what happens next will depend on many factors:
how high your blood sugar level is
what the blood sugar pattern has been over the last 3 months (there is a test they can do that tells this)
what type of diabetes you have (type-1, type-2 or one of the less common types)
what age you are
what your general health is like
and to some extent your doctor's own views on how diabetes should be treated.
Perhaps you could give us a bit more background info, like what age are you, what were the symptoms that led you to the surgery in the first place, whether there is any history of diabetes in your family.
I know it's easier to say than to do, but try not to worry too much about the outcome of the tests. High stress levels can actually raise blood sugar levels and give a false reading, but if it turns out to be diabetes then it's not the end of the world. There are many on the forum who have lived with diabetes for 40+ years and who intend to stay around for a lot longer yet. Let us know how your results go and we will do whatever we can to help you to understand the condition and to get on top of it.
Good luck.