Even if your hormone levels are "normal" you might want to consider using progesterone cream (it's otc and available at most health food stores or online). Progesterone balances out the cycles and helps women to ovulate regularly (which leads to regular periods).
You can pick up a book called what your doctor may not have told you about premenopause by Dr. Lee which talks about how to balance your hormones naturally.
I had a problem with amenorrhea back when I went off the pill. I went about 10 months without a period. I finally went to the doctor and they gave me a kickstart of hormones - it was just three pills.
You've mentioned your blood sugar level ... Are you diabetic or hypoglycemic? Have you had your thyroid, pancreas and pituitary checked as well? You might want to consult an endocrinologist instead of your gyno in this one.
Take care.