Carl, I have recently gone from 5.9 to 6.8. I am on 1000 mg of metformin 2x a day and glyburide morning and night. The night time glyburide was just added. Have patience, things change. Track your food and exercise for a while just to doublecheck yourself to ensure you are eating as well as you think you are. I have watched my morning numbers drop from 160-170 down to 120's just with a change of meds. I need to bump up my exercise level too which should help, but one thing at a time.
Renee is right! a change in your numbers is not a failure, just an indication you need to make some changes!
my best to you!