My blood sugar keeps doing super high

My blood sugar in the last couple of days keeps going super high from simple simple or even without eating at all, I inject myself the needed units of novorapid but it keeps still going higher or at least remain that high, I started doubling the units and still, this is the 4th day, I am eating almost one meal a day? Does this sometime happen to you? What are the suggestions here?

I had breakfast which had 25 grams carbs, my blood sugar was 7.2mmol/L and had 12 units of insulin and now it's now is 23.4mmol/L, I took for the meal 10 units, then I took another 12 units but nothing.