Bland foods and lots of hydration. I don't remember about the increase saliva. But pregnancy gingivitis is a real thing they say so take extra care of your teeth (sensitive due to vomit/hormonal changes). I remember my face felt stuffy all the time so a day time antihistamine helps and also if you are able to Benadryl during the day/night is shown to reduce nausea for some reason. I've tried myself and seems to decrease the nausea.

Ginger, honey, & Lemone ☕️

Sea bands mothers to be tea and preggy pops helps

Crackers were my best friend. It doesn't stop it but it helps dry the mouth to stop that pukey feeling.