Good luck Im 9wks and 5days and had an Apple on Monday and the vomiting suddenly began lol & I was perfectly fine before the Apple. Not saying it will happen to you but I think we are all safe on Lots of water, our prenatals and small snacks that you know for sure doesn't upset your stomach.
If you can stomach an apple eat one before you go. They give you as much energy as a cup of coffee would. Also take a nice nap when u get home