Had a fasting blood glucose test, had a tiny bit of oj before, could that have affected the numbers?

It was not fasting. Even small amount of oj means you were not fasting. Repeat the test without drinking any caloric beverage. U can drink plain water though.
Yes it can. You should plan to re test in order to have a reliable measurement. Only plain water is allowed the day of the test.
Possibly. Any food with sugar taken close to the time of a fasting blood sugar can possibly affect the results. If the amount was truly minimal and taken just before the blood test it might not have a major effect. However, if the result is abnormal it is best to repeat it under exact conditions - no food for 8 hours.