My cousin's wife had terrible nausea during her first pregnancy and had to be fed through an I.V. During her second pregnancy, she happened to be vacationing in the Thousand Islands. When she started experiencing nausea again, she went to a doctor in Canada (it was a U.S. holiday) for treatment.
They were horrified to hear that she had been given an I.V. during her first pregnancy when there was a simple medication for her condition. Most U.S. doctors are reluctant to give medication for nausea due to the Benedictin scare many years ago. They prescribed her the equivalent of 1/2 a Unisom (doxlamine) and a vitamin B6 tablet.
Here's another article with more information:
http://www.babycenter.com/expert/pregnancy/isitsafe/1366869.html
"The FDA has now classified the combination of ingredients in Bendectin (doxylamine and vitamin B6) as "safe and effective for nausea and vomiting of pregnancy" and you can buy both ingredients over the counter. Doxylamine is available as a sleeping pill (under the brand name Unisom Nighttime Sleep-Aid; be sure you don't get Maximum Strength Unisom SleepGels because that's a different product). And you can find vitamin B6 in the vitamin section, of course. Ask your doctor or midwife if this combination would work for you and, if so, what dose you should take. Remember: Never take any drugs, vitamins, or herbal supplements during pregnancy without first talking to your practitioner."
If you are experiencing nausea and you are not pregnant, you might try reading Sartre's first novel, Le Nausee, where the main character experiences extreme nausea as a result of a powerful existential crisis. (Sorry, no known cure for this one.)
Rebecca
P.S. I hope you feel better, Sharifa!