Anna, try not to stress about it. Chances are it will come back fine during the 2 hour test. If your levels were 8.4 after one hour, it's looking good that they will be below 8 after 2 hours which is the indicator they use. The fact that you had something to eat will also have changed the results as your next test (2hour) will be a fasting test. I failed mine and have GD, but my 3 levels throughout the test were 5.6, 10.1, 8.4. I've been dealing with it for 10weeks now and everything is fine.
Good luck...and don't get stressed because that pushes up your blood sugar level too!!!