I felt like that in the beginning louja, I found giving up healthy eating and focusing on what I could stomach helped - vanilla yogurt was good for me, and plain old oven chips! Certain smells made me feel worse, I avoided coffee shops for weeks! I also became really funny about the textures of food, finding somethings i used to love inedible. I was only actually sick a handful of times but I felt queasy for ages. Between that and the extreme tiredness, the first few weeks weren't much fun. Not much advice for you really, but hang in there, it's not forever!
Xx