Diabetes is random. Hope this gives you some relief. This is not as much a mental stess as it is a physical stress. It was explained to me that young children, develop Diabetes as a result of an infection or virus which creates a strain on the gene where Diabetes begins. But this is not isolated to children only.
Many adults end up having the same result.
It may not be a result of a virus or infection, but some other stress on the human body. Most doctors that I have spoke with, even have total faith that there will be a cure in less than 10 years. There is a control solution that should be used to test every new bottle of strips that is opened. It contains a controlled amount of glucose in it with the range posted on the bottle. If you had the levels that you posted, your symptoms would be more severe.