I would actually like it if you could explain diabetes and water drinking to me, please
I know I am not the OP, and that this seems to be (largely) off topic, but it's one of my soap box subjects and I can't resist answering your question...plus it's something I really wish more people understood.
<Steps onto soap box> Ahem...
The entire reason they thought you might possibly be a diabetic as a child was because of the excessive thirst/excessive urination...those are often the first, or even the only, warning signs of diabetes that a doctor or parent will notice.
The pancreas of type one diabetics don't (or can't) make insulin...type two diabetics might make plenty of insulin, or they might make too little, but either way their bodies don't use insulin properly. Type one diabetics have to have insulin to survive, many type two's can get by without even using medication (for a long time) if they are very careful.
Medical practitioners have very little real idea what causes the pancreas to stop working, or what leads to the development of type two diabetes. The 'common knowledge' out there about diabetes, even that pushed by the ADA, is very often wrong. I was a vegetarian, health-nut, who exercised for at least an hour a day, and had a BMI of 21 when I developed type two diabetes...so, which one caused it then, my healthy diet or my healthy lifestyle?
(Common knowledge my *#%! 
) I am also far from alone in not fitting the common idea of what leads to diabetes. Whether you will develop diabetes (or not) has very little to do with diet or lifestyle, and often seems to defy genetics as well. (Anyway...back to the whole drinking water thing. 
)Diabetes is frequently a dehydrating condition, because when the diabetic's system cannot process glucose out of the bloodstream properly the kidneys have to flush the excess from the body.
When the blood glucose levels start to rise dramatically the kidneys go into overdrive trying to remove the glucose from the blood which causes excessive urination. The excessive amount of water being pulled from the system by the kidneys while trying to process the glucose out of the blood leads to dehydration and causes excessive thirst, on top of the already excessive hunger the diabetic is experiencing because, rather than being used, all the glucose is floating around uselessly in their blood (or being eliminated as waste).
More water will help to flush some of the excess glucose out, but if diabetics in this cycle eat any carbohydrates (of any kind) they just continue to have steadily rising blood glucose levels because their bodies still aren't using the glucose that is already there. So, the glucose from pretty much anything hyperglycemic diabetics eat will just float around in their bloodstreams until it too is eliminated as waste...all the while their brains are sending out signals telling them that they are starving to death because they aren't able to use the glucose that is already there.
It's a horrible, miserable, vicious cycle, and can be quite painful in a wide variety of ways (both physical and mental).
Basically, diabetics will frequently feel like they are starving to death and dying of thirst (unless/until their bodies finally start to process excess glucose), because that's exactly what their brain is telling them is happening.
<steps off of soap box, takes bow>
Sorry that was so long, but I hope it explained the diabetes and drinking water thing.
That whole process I described above is why I think that all endocrinologists should start suggesting vaping to their patients who are struggling to get their BG or weight under control. It's really hard for people who have never felt that cycle to understand, but people who've tried to quit smoking can understand it far better than most. There are times when I am so hungry I feel like I can't think or times when I have vivid dreams about stuffing myself with candy even though I don't have a sweet tooth or want to eat any sweets. Intellectually I know I'm not hungry, and I'm not starving, but I feel like I'm gonna die if I don't eat.
Those food cravings can be far worse than the overwhelming nicotine fits I had every other time I ever tried to quit smoking (the ones without my PV). Maybe it's just me, but do you know what I mean...about those times when you wanted a cigarette so badly you would have happily fought someone just to get a whiff of one?
My PV and sweet flavors have been a godsend, not just for getting off the stinkies but for ending those godawful food craving cycles I had absolutely no control over. Now I can use my PV to help stave off those cravings as well, while I work on getting my BG levels down. It's a huge relief.
