I joined because I saw this topic and was interested. I’m 75 years old and have been working on cars as a business in my younger years and a hobby in my later years my whole life has been about cars and about 4 years ago this problem developed. nauseous while laying on a creeper under a car but not a problem when going to bed. No cars running so no fumes sometimes worse than others but there doesn’t seem to be an answer. I’m bothered by it because like I say I’ve been doing this for over 50 years an this is new to me. I see so many of you have this problem and I hope someone finds relief to this problem I don’t want to quit and become a couch potato. I will look into Clonazepam