Infections raise blood glucose for most people. So when you have active infection, it might be higher then.

Ask for a fasting INSULIN level. If this is higher than normal then you are insulin resistant. The most common intervention for this is tight diet control...following a metabolic syndrome diet which is higher in fat and lower in carbs with alot of protein. Watch portion sizes too.

The most effective drug for this is metformin.
Stress and steroids also raise blood glucose levels.

It might be a good idea to get a glucometer (there are some mini's now that are less than $20 and often free online).

Testing yourself during the day may reveal more. But your A1C is still in the normal range. If you are becoming insulin resistant however, glucose is not getting into your cells well, and you then feel weak, tired and shakey. (worse in between meals). This can lead to carb craving which help in the short run but create more problems in the long run.

In regards to your sleeping problems... there have been new reports that the H1N1 vaccine is causing narcolepsy in Europe. Their vaccine was a little different than US however.

http://blogs.nature.com/news/thegrea..._cases_sp.html