Throwing up a lot generally means you have high hormone levels which is a good thing.
Food doesn't matter so much, but try keeping your fluids up and drink small amounts often. Drinking large amounts will increase the chances of you vomiting.
Pinch the skin on the back of your hand often to check for dehydration and if you're worried, please see a doctor.
Most normal morning sickness only lasts 12-14 weeks into a pregnancy so start the countdown!