How do I cope with morning sickness so that it does not influence my work?

I constantly feel like throwing up, my stomach and throat feel like they are on fire, and I fear that I won't be able to keep anything down. I work in the IT industry - an Oracle yst. I travel a fair amount for my work, and deal with clients a lot. I don't want my pregnancy to affect my ability to work. Then I may as well quit if its going to undermine my work quality.