most likely no. I failed the 1 hr with this pregnancy and my last two. The last two times the 3 hr came back perfectly normal...this time the doc said i'm "borderline" so just to watch sugar and starch intake...no more testing, no diets, no insulin. I wouldn't worry, a lot of women fail the one hour and with it only being 1 pt over chances are you'll do just fine on the 3 hr
I would definitely say most likely not. my bf's mom said she had to redo the whole thing because it was off, but she didn't have any problems.. Sometimes it's just a tad high, it sucks you have to do the 3 hour test... But if it's only one point, chances are that you will be fine. Those levels can fluctuate so it may just be something you ate the night before, or something. Try not to worry about it too much. And good luck.