what would you do when you can't eat a thing

[nothing2lose]

Maybe try some nuts too. They have the same salt as potato chips (if you get salted) but are better for you.

Mix in some almonds and cashews, etc and just kind of graze.

[Traveller]

I'm sorry you are feeling so horrible Are you taking a pregnancy multi vitamin to make up for your lack of food intake?

I would second what n2l says about grazing, and nuts are an excellent source of protein. Almonds also have loads of calcium so they might be a good choice for you. Crackers with a bit of cheese could work as a small snack and as an alternative to potato chips. Keep trying to introduce new foods and you may find one that agrees with you. I hope this improves for you soon.