Hi, I'm not a medical professional, just the parent of a kid with diabetes. Here is some good information on the fasting glucose test:
http://www.****.nih.gov/I really don't know how much the test costs, and the actual procedure at the doctor's office doesn't take long at all. The biggest thing is that you cannot eat for 8 hours prior.
The frequency of urination depends on many things, including how much you drink. If you drink a lot of water, you'll urinate more. If you drink a diuretic, that will cause you to urinate more. Symptoms of diabetes are listed here:
http://www.****.org/
Most common symptoms are frequent urination, extreme and constant thirst, unexplained weight loss, increased appetite, and being very tired.
You can do a simple blood sugar test on your own, but you'd have to purchase the meter yourself, so you're likely better off just to go to your doctor. Good luck.
Also, is there any way I can test myself without seeing a doctor that might show whether or not I have diabetes?