You are probably taking too much insulin. What was the insulin to carb ratio you were told to use ? I would guess an avg is approx 1 unit per 10g of carbs. Some will take more, some less. You would not need to inject for the eggs so it's just 2 slices of bread. Probably no more than 15g of carbs each ? Difficult for me to say as I have no clue what brand or size bread you ate. I would probably take 3 units for this meal. Obviously check with your healthcare providers before adjusting any medication first.
Mo