A single treatment can't work best for every woman. You will have to try many techniques to make one thing work.
Some small changes which can help you overcome nausea:
1.Eat small amounts of food frequently so that you are never too hungry or too full.
2.Avoid spicy and fatty foods, and foods with odors that bother you.
3.Limit your caffeine intake from coffee, tea, sodas, and chocolate.
4.Contact your doctor to know about your physical activity. Do not try anything on your own.
5.If you smoke or drink alcohol,please stop these habits right away. They can cause long-term damage. Talk with your doctor about steps to be taken to stop smoking.
6.Ask your doctor before consuming any medicine. Some medicines may not be safe during pregnancy.
Minor modifications can help you overcome nausea. A balanced diet, moderate exercise with a good amount of water is also equally important.