To put it simply, if you are not on insulin or Glic or other medication known to cause hypo's; and you are just a Type 2 (without RH) then you are extremely unlikely to ever see a number which is 'too low'.
Even numbers which would cause a Type 1 or RH to worry and reach for the glucose tablets isn't a problem for a normal Type2 because when we get low our liver starts putting glucose into our bloodstream so that we bounce back automatically.
I wonder why you are trying to read the immediate high's from meals. What purpose does that serve? Even non-diabetics have an increase in BG from meals until their insulin response levels it out. It is only about 2hrs after first bite that their BG reading is almost certainly about the same as before the meal - so that is why us Type 2's measure 2hrs after first bite, because if it isn't a good number by then we know that our body didn't handle the meal so well because it contained too much carbohydrate.