Your blood glucose reading at the doctor's of 7.7 (138 in the U.S. scale) taken at 45 minutes after lunch is not necessarily ok. Many of us don't reach our peak post prandial until 2 hours after eating in which case you could have peaked at significantly higher which is NOT normal for a non-diabetic. Mysteria's answer is the classic experience of a Type 1 but not of a Type 2. Type 2's in fact can have little or no symptoms and be diabetic.
You may suffer from hypoglycemia alone or you may be pre-diabetic or diabetic. Only your doctor can tell you for sure. It sounds like in the next week he is going to do either an A1C which tests for your average blood sugar in a 2-3 month period or an OGTT which means drinking a high sugar liquid and testing your response over a couple hours. At any rate his comment that severe hypoglycemic reactions are common in women your age is absolute nonsense!
I'm glad to say that i dont think you have diabetes, i have suffered form diabetes type 1 for nearly 7 years. Normaly in the onset of diabetes you will be constantly thirsty, needing to urinate alot, have a lack of energy and feel sick, they are the common simptoms for diabetes.
In the onset your sugar level will be high not lower and will normaly be the start if DKA (diabetes ketone acidocis).
7.7 is an good level.
i hope this helps,
Mysteria
Your symptoms sound more like very severe hypoglycemia to me, but the results of your lab tests will be the real answer. Your numbers there after a meal sound pretty normal. You may want to check out the information on a website for people who suffer from hypoglycemia: www.hypoglycemia.org. There is a question and answer test you can take to see if you fit the classic symptoms and also good information about dietary changes that you may need to make to help keep this under control. But, no, these are not symptoms of diabetes.