I'm 17 weeks but I had the same problem too. Just try to eat light and drink a lot of water between meals or what I did was every time I swallowed I'd take a drink of water. You just have to see what your body can handle right now and always eat light and snack throughout the day.
I'm 26 weeks and I still have it. Ask your Dr for zofran, if you can't keep the pill down there is one that goes on your tongue. They usually work pretty fast.
I'll be 14 weeks tomorrow and have the same problem, i get nighttime sickness the worst!