merk is right bunny crap beige/carb food is the way to go.
I got through lots of scotch pancakes, malt loaf, crumpets, muffins, crisps, snack bars, biscuits, crackers, toast and sandwiches!
Would literally be eating them in the middle of the night, say 3am or first thing before I even got up to pee! for weeks I would take buttered scotch pancakes or maltloaf (wrapped up) to bed (think this was booms suggestion) so I could eat it without moving.
(managed a fair few Maccy D's in these weeks too, was almost like I was craving the salt and fat!)
I also still take my vitamins at night as this was the time I was least likely to be sick.
So basically my choice was eat little bits of rubbish food very regularly and put on a bit more weight than I should, or eat normally which would end in being really, really sick and unable to eat 
then get dehydrated and feel awful.
I definitely did not have it as bad as some, but did have 5-6 weeks off work and was being sick 8ish times a day with almost constant nausea (only got better because of tablets and I am still taking them 
).
Best advice I can give you is get in there with the snacks now, don't put up with it and 'see how it will go' - made this mistake on and off for too long. Apparently the earlier you can get on top of the nausea/sickness the less likely it is to get worse or last as long.
cheese spreads, chocolate spreads and jams were used to excess in this household too!
Hopefully yours will not last too long 
, it really is different for everyone!
i did quite enjoy eating all those carbs at times as we don't normally even keep bread in the house!
hungry now, off to make a sandwich 