I have an idea about a cause of diabetes, more times than not, is an exposure to 2-butoxyethanol that is very rampant in our society, and has been so for 80 years or so.
It causes autoimmune metabolic issues; so overweight may not be your fault. I also have type 2 diabetes, which in my case I suspect is a birth defect from my dad's WWII Navy service. Bomb fumes in eyes ... and that is the worst exposure, then there are several types of birth defects, even brain tumors and leukemia which are possible. Diabetes gets more credit for causing harm than it should, if you ask me. It is a cause of Chronic Fatigue Syndrome and to prove its harm you have to prove the fatigue that doctors say they don't know what it is.
When you do see a doctor be sure to ask if there is blood in urine and whether or not red blood cells are small-sized. Well, that would be if you had your own direct exposure; it doesn't show up if it is a birth defect ... just singular items ... then look for the CFIDS or CFS symptoms in one or both of your parents.
The fatigue would be autoimmune hemolytic anemia if it is from 2-butoxyethanol. It is a rest that sleeping does not help with. I've written lots of web pages on this chemical and the effects I suspect. Here are 2:
http://www.valdezlink.com/pages/diabetes.htm
and
http://www.valdezlink.com/pages/foryourdoctor.htm#for
Freshgrape,
As you know, we're volunteers here, not medical professionals. I"m glad you're going to get a call from your doctor. The symptoms you describe *are* consistent with diabetes.
In addition, a blood sugar of 167 may (or may not) indicate diabetes, depending on when that reading was taken. Unfortunately, your dad's readings in the 400s are extremely high and quite dangerous on a long-term basis. Given your weight and your symptoms, I'd encourage you to read about diabetes and how to care for yourself in ways that will not only bring your blood sugars into the normal range (typically 70-120) but will also help you feel much better physically & mentally.
It is one thing to know "about" diabetes and to see others who have it. It is quite something else to learn about diabetes and the careful balance we strive for between our foods, meds, exercise & rest. Perhaps you can inspire your dad to find the courage to do better, too.
While our site focuses on Type 1 (juvenile) diabetes -- a different disease -- there are many similarities including the dangers we face from sustained high blood sugars. Here's a reliable website with information about normal blood sugars, pre-diabetes, and diabetes http://www.diabetes.org They have helpful info to learn about diabetes (be patient since there's a LOT to learn beyond "avoid sugar"). Please get in touch with your doctor, too.