Diabetes doesnt always come up in your urine, mine didnt. I used to get shaky and crave sugar alot and i turned out to have GD.
You will only be screened for it if you are at risk from it. Make sure you mention it to your midwife and get her to send you for a glucose tolerance test. About now is when GD shows up, but from what I know, GD is too much blood sugar so having some chocolate wont help! I used to feel shaky after eating a large meal or indulging a bit. The more sugar I ate the worse i felt.
If you get a GT test, the results come back the next day so you wont have to wait long. Until then, why dont you have one day where you avoid sugar, cut down on your carbs and eat loads of protien instead, just to see if you feel better.
On the amemic side, pull down your lower eyelids and see what colour the skin is underneath, if it is pink you are fine and your latest bloodtests should show you are not anemic. If it is white or very pale, then go drink a guiness, eat some beef and loads green veges. Your MW will pick up on it and give you tablets if need be.
Hope you are ok tho! None of these things are worth stressing out about and are normal pregnancy things that go away once baby is born.