I understand- I am going through the same thing right now. I had gestational diabetes, and my mom has type 2 diabetes, and my last sugar tests (for the day and for the month) came back a little high last time.
I will be doing the GTT at least by my next clinic visit, and in the meantime, I am doing pretty much the same thing you are- monitoring and keeping a record for my next clinic visit (be sure and keep a record, including what you ate), so I have a better idea what my triggers are and to try to go ahead and keep it in check with diet and excerise.
I discovered yesterday that Strawberry shortcake for dessert after dinner will mess me up for the whole next day <img src="i/expressions/face-icon-small-blush.gif" border="0"> .
Today, back to normal <img src="i/expressions/face-icon-small-smile.gif" border="0"> (97 when I woke up, and 117 2 1/2 hrs after breakfast, which is my worst time of day).
My only symptom is being more tired, too and I also haven't been getting enough sleep, but I do feel a bit better when my blood sugar is normal when I get up. This morning was a good example. I knew it would be normal or close to normal, because I wasn't dragging like yesterday morning, when it was high. (Not a substitute for testing, btw <img src="i/expressions/face-icon-small-wink.gif" border="0"> ).
Like Uli said, it is the same pinprick that you do at home as at the doctor's office, so don't worry about that, and go ahead and schedule a test. It'll be okay <img src="i/expressions/face-icon-small-smile.gif" border="0"> .