Different things help with different people when it comes to pregnancy and nausea. For me, it was avoiding meat and quitting smoking for the pregnancy. If it helps you, then keep on doing it. If you are worried about what is in the ginger ale, then you can make your own. There are plenty of recipes on the internet on how to make it that way you can control how much ginger, sugars, etc is going into the drink, or you can make yourself some ginger tea with some honey.