hi is the number 6.8 high,i keep feeling like my blood sugar is going,low,feel like i have to eat evey few houres,a friend of mine has diabetes so he did a test on his machine,two houres after eating and it was 6.8, i had a test about two years ago again after eating and it was 9 went to the gp had a test after fasting and he said it was ok,should i go back,shirley