Gdm Diet

I have gdm and I'm told by my dietician to just adjust my food intake such as less sugar, oily food and carbo consumption. But healthy are very expensive nowadays, especially when people are buying in bulk. Anyone who has been through it can recommend me some examples? I have a list of examples given but I would like to know how you guys do it. Anyway I'm a full time mom student currently 8 months pregnant with an 11 month old baby girl.