Hi DB,
in the initial stages I would suggest you need to test many times a day to find out what effects your different foodstuffs are having. I tested as follows :-
First thing on rising (fasting)
Breakfast + 1 (hour), Breakfast + 2 (hours). Midday meal + 1. Midday meal + 2, Evening Meal + 1. Evening Meal + 2 and on retiring.
My lo-carb target is approx 50g per day, though I dont get too irked if I go a little above or below.
Now I know what I can and cant eat, I have lost 5 1/2 stones since May 2009 and my blood glucose readings are more often than not in the non-diabetic range. My last HBA1C was 5.6% (originally 10.3).
As for crackers, I often have Melba Toast or Matso crackers for breakfast, they fit perfectly into my lo-carb regime. Fruits are a strange one as some can tolerate them whilst others can not. I am OK with berries as long as I dont overdo it.
Non- diabetic readings are Fasting, under 5.5, meal + 1, under 7.8 and Meal + 2 under 6.6.
The NICE guidelines for diabetics are a little higher.
Looks like you are eating well and making great progress to me.
Just up the testing and food experimentation for a bit!
All the Best - Steve