I used to put a slice of lemon in ice cold water. Helped me tolerate it better. The smell of tap water made me sick (yes, it does smell!) So I drank bottled water through my entire first pregnancy. I couldn't drink anything else.
I couldn't eat much either. I lost too much weight in the first half of 3 of my pregnancies.
Nothing helped for me, but there are plenty of things you can try Have you tried ginger beer? I'm not a fan at all, but it helped me a little on occasion. (Severe ms, so not much helped)