Poor you Meggle. If you need a shoulder, I used to be a support / Info contact at the charity (HG awareness) i linkd to before, feel free to CAT me. Been there myself, lost loads esp. with ds1, ended up on a drip.
medication saw me through too, but it did take a few tried to get the right one for me.
Fklat coke is supposed to be good, ginger is in reality only strong enough (unbless for placebo effect) in much larger amounts than you'll find in biccys- crystallized ginger is good, though.
Then it's the usual staples of lucozade etc/ if you cn try ice, try frozen lollipops- at last they have calories.
TRhere is also a theoretical link between tiredness and nausea that you should be aware of, sor est is essential.
Do remeber that the baby will get what it needs 9apart frm fluid) regardless, so what you must focus on is eating something- anything- you fancy, rather than worrying about nutrition. Butrition doesn't really come into it at this stage.
XXXX