Are you limiting the amount of the high carb foods?
Porridge, pineapple and peaches are all high carb, and although they might not be increasing your carbohydrates over what you can cope with many people find they are more carb resistant in the mornings and so high carb then has more effect.
I was really ill on Metformin, despite it being described as a safe and effective drug.
I could not eat anything with a strong odour whilst under the influence of Metformin - nor drink anything but water, tea tasted vile and many things were strange.
Try some really rather bland foods to see if that helps, but do try to eat enough protein and fat to keep yourself healthy. They are the essential foods but carbohydrate is not.