Porridge sends me through the roof... so does cereal...
I have natural yoghurt (or alpro coconut) with a sprinkling of blueberries, strawberries, raspberry (depending on what is available) maybe even a spoon of peanut butter mixed in with a cup of tea for breakfast...
You can also try omelette with cheese, mushrooms and baked beans.
Don't starve yourself, try alternative foods and see what works for you.
When you're hungry inbetween meals try some cheese (which gives loads of calcium and vitamins without the sugars) or a handful of nuts... be careful though as they do contain some carbs and try not to go for the salty ones.
Dinner can be really easy like mushroom soup (onion garlic mushroom, cook in some stock, whizz to make puree then add a bit of cream and cheese... makes loads and doesn't raise Bgl. Also you can then add the carbs in bread form to suit your meter)
Fish is another good choice with a salad, asparagus making sure to fill up on the veg. These foods can then have carbs added to them.
Did the dietitian give you an information sheet, mine gave a sheet which says 50g of carbs per meal time, 1 slice of bread equates to about 20g of carb. However you need to equate in the carbs in the rest of the meal. Change to wholemeal where possible.
Berries are lower in sugars than fruit like oranges and apples, so cherries, blackberries etc are really good (when you can afford them)
Also fruit juice contains loads of sugars so water it down and as my dietitian said, it may have the same amount of sugar as fizzy drinks (no diet) but they aren't empty calories... I do however find the berry juices lower in sugars and make my own smoothies with them and natural yoghurt.
See what works for you... these are just ideas.
Tonight I am making dolma which is a north African dish. Stuffed courgette and cabbage soup... filling... plus I get my own back on hubby (who isn't suffering pregnancy symptoms) when the cabbage comes in to play later...