Sometimes, as you get BGs under control, the odd bit of nuaghtiness does not always result in very bad BG figures.
It is always worth testing if you have been naughty, it is surprising how your body might be able to handle a bit of sugar.
Possibly due to your body having had a bit of a rest, the pancreas can sometimes start pushing out a bit more insulin and your insulin resistance can improve a bit. If you have lost weight as well it will help a lot.
So, always test even if you expect bad results, if you do get high readings it can concentrate your mind a bit, then you think "I won't do that again", if you get OK readings then you might think "That's not bad considering".
Over Christmas I managed a mince pie (7mmol after 2 hours) Roast potatoes, Nut roast (I am a veggie) roast parsnips, sprouts, and a small lump of stuffing, that was followed by apple pie and custard made with Splenda, after 2 hours I managed 9mmol! It must have been the red wine that helped
H