hello again northstar,
good advice from misdee (who has undoubtedly seen a dietician more recently than me...). hope you're feeling a bit better & less hungry. is your GD being controlled just by diet, or are you on insulin injections too?
good snacks include fruit, wholemeal toast (with marmite if you like), a bowl of cereal, yoghurts, a couple of slices of malt loaf. what you don't want are sugary things which will raise your blood sugar quickly - as well as obvious things like cans of coke & bags of sweets, fruit juice falls into this category, so probably best to steer clear of it.
to fill yourself up without eating carbohydrate & therefore affecting your blood sugar i would say eat vegetables,or drink lots of water/sugar free drinks, ummm, running out of ideas here!
how often are you testing your blood? what kind of readings are you getting, & what guidelines have you been given? for me, whilst pregnant, i've been told to keep my blood sugar between 4 & 7 all the time. i do this by using a lot of insulin. it's hard work but do-able.
also, & i don't want to scare you, but 23 weeks is pretty early to be diagnosed with GD. there's a small possibility that it might not go away once the baby is born. are you seeing a diabetes team? it's probably worth getting checked out once the baby is born just to make sure everything has gone back to normal.
hope this helps.