I'd ask for a test. Diabetes, as you can see in the media, is more widespread than you may expect, and if you catch it quick enough it's FAR easier to deal with than if you leave it while your blood sugars get worse and your pancreas deteriorates. You can get a simple finger-prick test while at the docs, which will only give an indication, (although a better indication if you had the test in the morning as early as reasonable, and didn't eat or drink, other than water, for 10 hours before) If the indication is that it's possible, he can then send a sample to the lab (or arrange for you to have a blood test at the hospital) which can confirm one way or the other. Nothing to lose, so if in doubt, get it checked.