Daily vomiting.. Please help!

I work in a factory which requires standing in one spot all day. No matter what I eat in the morning I find myself hugging the toilet at least 90% of the time I actually go to work. Keep in mind I start work at 5:45am. However on days I can stay home, relax, and sleep in I have no issues. Beginning to think that physical activity (standing even) is the root cause of my sickness now that I have rulled out it being what I eat. The nausea is usually preceeded by dizziness and hot flashes. Please help me!