The first thing is - don't panic! Most of us on here have diabetes, Types 1 and 2 and a few in the middle, and we're all still enjoying life and doing most of the things we've always wanted to do. Some of us take the drugs - many don't.
You're not going to drop dead or even be really sick immediately, so try to keep calm. Do a bit of reading around on here and on the main site so you get some idea of what all the terms mean.
If you're having a fasting blood test on Tuesday morning you need to have nothing but water for 12 hours previously. This is not as bad as it sounds, when you think about it! The only thing that really gets me is, no cup of coffee first thing. I take a flask into the surgery with me :lol:
Good luck! Come back and let us know how you've got on, and once you get a diagnosis we'll be able to help you in lots of different ways. We've all been there!
And don't panic!
Viv 8)