Hi my reading last night 2 hrs after dinner was 20.7 this morning before food and drink was 12.7How was your own testing? While 13.5 is high, it's not as high as the HbA1c suggests & not high enough for ketones to be a concern (I was told no need to test unless 15+ consistently). So bearing in mind that the HbA1c is a 90 day average, you may already be coming down naturally.
The odd sandwich isn't going to do any great harm, although I was using tinned soups for lunch when I was high. A cream of chicken or mushroom only runs to about 15-20g of carbs.
I'm going with scrabbled egg today for lunch