Is there a pattern when it gets worse at all? Just wondering if there's a smell or something that could be triggering it. For me it was bacon & fish, ooh and garlic. I would avoid them like the plague as I knew it made me bad.
There's a new type of Smash out that's on offers, it's meant to be really good. Over making yourself bad by standing peeling potatoes, maybe having a few short cut foods would be good.
A relative swore by arrowroot crackers / biscuits, but the magic didn't rub off on me. 
I think it was a generic ginger ale I tried in the final trimester, it really did work. I remember as we were at a party, I was offered some, as it made me feel better (sipping slowly - with or without ice) I went a bit crazy for it.
I think it's actually the progesterone that made me sick, as when I tried progesterone contraceptives it was the same as MS. I had to beg the clinic to remove the implant I had it was that bad.
Don't feel guilty about comfort foods, to be honest low blood sugar can make things worse, so all the more reason to have a few sweet things now and then.
Really honestly hope it passes ASAP, I hope you find some safe foods / drink that don't trigger the nausea or vomiting.