Glucose tolerance test tomorrow. Freaked out. :(

Juliana
So I got my results last week from the glucose level test and the Dr. Called me to tell me The results had come a little on the higher side. I had 144 and she said normal levels were i believe anywhere from 69-139. So Now I have to go back to do the test early morning woth nothing to eat and they will draw blood every hour for 3 hours. 
Has anyone have the results from the second test okay? My co workers say my first test could've been altered by something i ate/drank in the morning since it only required for me to stop eating/drinking 2 hours prior to the test. Could this have been possible? I am really freaking out about tomorrow :(