It sounds to me like you need to start the day with protein, instead of whole grains. That was always the case with me. My first meal of the day has to be eggs (or some other form of high protein), or I experience "crashes" all day, no matter what I eat. I believe this is because the body needs a slow burning fuel to get things started.
As for endocrinologist- I've seen about 5, and finally found one that was able to explain to me what was going on with my body. A lot of them will tell you that a BSG of 70 is fine and doesn't need to be addressed, but keep looking until you find a doctor who will listen to you!
However to be honest, the most help I got was from seeing a Naturopathic doctor. They will help you identify very quickly why your body is out of whack and what supplements you may need. For example, if it is your thyroid, you may simply need iodine supplements. This is actually the case with me as well.
The most important thing is to educate yourself about this condition and read up as much as you can on it, in addition to keeping a journal of what works and doesn't work for you. The one endocrinologist that acknowledged the problem didn't do anything else for me but explain what was happening in my body. Its been about a year that I've been managing my hypoglycemia through diet and nutritional supplements, and I can tell you it feels good to feel I have a handle on things. Even when I have a not-so-great day, I don't get so anxious because I can usually pinpoint what's going on, whether it be what I ate, activity level, getting sick, little sleep or the like.
Good luck to you!