What questions should I ask my doctor?

[kcr01]

I have had extreme fatigue and muscle weakness for years for which no cause has been determined.  I often feel dizzy and have trouble concentrating.  
I had a test done about two and a half years ago for hemoglobin A1C and it was 5.2 (mean blood glucose 108).
Now, 2+ years later I had a urinalysis done and I got the results and it showed I had glucose in my urine, which my doctor has yet to even mention over 2 weeks later.  This got me to looking back at my A1C test, and I realized they had also tested my blood glucose (it was 85) but since it was so long ago I have no idea what time of day it was or how long it had been since I'd eaten.  I know for sure they didn't ask, because the doctor doesn't even tell me what tests she's ordering, she just puts in an order and sends me to the lab on a different floor of the building and I get whatever tests she's happened to ordered.

I'm not sure what could be causing glucose in my urine. Any thoughts on this?  If anything I've been complaining for years about feeling like I have low blood sugar, but what I mean is that I sometimes feel shaky and dizzy if I don't eat and I'm always tired and my muscles feel weak.  If my mean blood glucose was normal at 108 back then it could be different now, but what other symptoms would I have if my blood sugar was getting higher or lower?  

Thanks in advance for any help!

[WaveRider]

" I know for sure they didn't ask, because the doctor doesn't even tell me what tests she's ordering, she just puts in an order and sends me to the lab on a different floor of the building and I get whatever tests she's happened to ordered".
Ask her to explain what she suspects then you'll understand what the tests are for. Doctors order tests to either rule out something or to verify their suspicions. Once you get your test results back you should discuss them with your doctor. If you don't understand the explanation then Google each test for an answer.

"I'm not sure what could be causing glucose in my urine."
When the blood sugar level is very high, as in uncontrolled diabetes, the sugar spills over into the urine. Glucose can also be found in urine when the kidneys are damaged or diseased.

"I sometimes feel shaky and dizzy if I don't eat and I'm always tired and my muscles feel weak."
Did you mention this to your doctor? These are signs of hypoglymecia, low blood sugar, and must be discussed with your doctor so she can put you on proper treatment.

[kcr01]

p.s. If it might help I should mention I am 5ft 3 1/2, weigh about 113 now and weighed about 120 at time of the blood test (didn't diet or anything, just somehow lost a few pounds - I do have a slightly smaller appetite but it's not significantly smaller than back then), and I do try to eat a healthy mix of carbs and protein and low fat, but my diet is not perfect (I eat ice cream every now and then!)
The glucose level in my urine was not excessively high (it was 1+ and I'm pretty sure the lab uses a scale of trace - 3+, so I had more than a trace but not a super high amount I guess).