Why do i only get sick toward evening? i go all day perfectly fine then around 8 or later i'm nauseous. not everyday though just a few nights a week

Many possibilities: There are many possibilities that could cause thise types of symptoms. It could be your gallbladder related to eating fatty foods for dinner. I would get in to see your doctor for a checkup.

Sounds like: Poor diet, particularly the sugary stuff. The nausea is caused by compromised metabolism in brain. You get secondary vitamin b deficiency.