Hi there - if the blood tests are the same as I have had - which includes a HbA1c test, then that looks at what you have been doing over the past three months - so any changes now would have very little time to take effect! I would think that a glass of wine every now and then would be ok - but home glass sizes are larger than a standard unit, so yo may hve to cut down - may be have it as a spritzer with soda water or diet lemonade. Stress is not a good thing, but sometimes cant be avoided - there is a limit to what you can do with your lifestyle - I would work on the fact that this is a long term problem and look at small steps to change small things, that over the months would add up to bigger changes - maybe look at changing one bad habit every fortnight, and take it from there - as long as over each 3 monthly tests there is a change in your levels for the better, then that is a good thing.
Well that is my philosophy about it - I was diagnosed a month ago, and find it difficult to get out of some bad habits - slowly but steady!!
Good luck!!