It looks like you have only been diagnosed a very short while. Sometimes there is variability in results; especially in the morning when many folks find themselves to be less carb tolerant. Other factors that can affect readings are lack of sleep, infection (whether overt or not), exercise, or lack of, stress, the weather, not all carbs react the same and lucky pants being in the wash.
Clearly that last quip is very tongue in cheek, but sometimes we all get readings we just go "Eh?" to.
In isolation, record this reading, and move on. Try the same brekkers a couple more times and see what happens. As I alluded, not all carbs are equal, and some can eat x food, whereas to thers such a food or ingredient is blood sugar rocket fuel. Sadly, this early period is very "educational".
Stick with it, but don't think if failure. You're very much still in data gathering mode, in my view.
Good luck with it all.