What medications is your husband on? What does he eat? Please cut out all transfats, every scrap of it, replace only with good fats, what are his readings like and does he take any supplements at all?
Has he/have you read the diabetics bible Dr Bernstein Diabetes Solution? Is your husband overweight? And does he exercise?
Sorry for asking all these questions, just that I am trying to see if there are any helpful suggestions that any of us in this forum can come up with.
It is terrible that you two have to live with the fear of 'he is feeling tired and unwell, wondering what the hell is just around the corner' - all this feeling ill and tired could be a side effect of the medication that he is taking, who knows some of them might even clash, medication could deplete vitamins and minerals and any deficiencies there can cause tiredness/feeling unwell too.
In addition I can imagine that he is pretty depressed as well, diabetics are prone to depression as it is and even more so if he is not feeling good at all and worrying about what might be waiting for him around the corner, I bet there have not been too many good news for him.
Thinking of you
Karen