Glucose test

Magan
So Wednesday I took the glucose test. The doctor told me to "eat normally". So I ate at 7am like normal went to work- my boss forgot it was a short day so I was not given a lunch-so I ate when I got home at 2- the test was scheduled for 3. 
Got call from doctor yesterday and they told me I "barely failed" so today I am sitting here suffering through the three hour test. Is it normal for them to let you eat for the one hour? And did anybody else almost pass out during the three hour test?