All sickies,
Think of the cold as building antibodies against the NEXT one. Sorry for all the drippy stuff and swollen stuff and general misery.
Lulika,
First, I don't think a day or 2 of high bg is going to wipe out the rest of your excellent bgs for the last 6 weeks. Even if it is a little higher than you'd like, there's always another one a few months away!

If I remember, you are not taking insulin. If that's right, could you get the doc to let you have a little to try and get your sugar under control? I think you'd feel better even with the cold and you'd probably heal quicker.
Mike