You can buy a $20 meter at any pharmacy and test yourself. You do have to poke yourself in the finger to get a drop of blood, however. You need to look up 'diabetes criteria' in order to understand your numbers.
You can also just call your county or city local health department and ask where there's a free diabetes screening in your area, and someone will do the finger test for you. Free screenings are typically held periodically at fairs, grocery stores, and churches.
They blood drawn with a needle will give a more accurate result, but not dramatically more accurate.