When I had m/s all I could stomach was 2min noodles with tomato sauce (ie. ketchup), plain bread rolls (lived on these) and cheese.

That is all I could eat. I didn't loose weight though, I guess because I could stomach a few things. I think speaking to your caregiver is a good idea. They may be able to give you something for the nausea, which may bring your appetite back a little bit.

I hope it doesn't last too long for you