If you have diabetes then you cannot cope well with carbohydrates.
Carbohydrates are all the digestible starches and sugars.
Porridge and bread are made from grains, which are high carb.
It appears to be perfectly safe to eat as many eggs as you like - as some real research has been done now. Do not eat low fat, as your baby's brain and nervous system is being built from various lipids and you'd not want to be lacking.
You can eat any meat, fish, shellfish eggs or cheese, eggs, and low carb veges, all you like. As you can test yourself you can see just how food affects you, so you can add in lower carb fruit and veges on top of the basic type two diet, governed only by your BG meter.
I ate low carb foods throughout my first pregnancy - that child was so active, and grew like a weed. He is well over 6ft tall and still slender in middle age.