Hi there
I have hereditary pancreatitis too - though I'm a 43 year old man not a 3 year old girl. This must be a really worrying time for you and your family, particularly as your daughter is so young, so my thoughts are with you.
I had my first acute attack of pancreatitis last year (the first of three so far) and developed diabetes between the second and third attack. In my case, I had no pain from my pancreas between the attacks, but suspected that I was developing diabetes. I didn't find myself going to the loo a lot, drinking large amounts or losing weight (some of the classic signs of diabetes), but I was hungry all the time and suffered a lot from foot cramp at night. So, in short, yes, this could be diabetes.
When I was in hospital following my second attack, I had some high blood glucose readings - about the same as your daughter's or a bit higher - but some normal, and at least one blood test came back normal. I'm not sure what was going on, but I imagine it as being like a flickering lightbulb, with my body making a last desperate attempt to produce enough insulin before finally giving up. So, even if your GP finds that her readings are normal, it might be worth monitoring her blood glucose levels over an extended period of time.
I hope you have taken your daughter to your GP already but in accordance with NICE guidelines, she really ought to be seeing a consultant at a hospital that specialises in the treatment of pancreatitis. As well as testing for diabetes, they may also want to test her for pancreatitc enzyme deficiency to make sure that she is able to digest food okay. (I had big problems with cheese and meat causing stomach upsets until I started taking enzyme supplements.)
Best wishes
