Keep drinking small amounts and often. Even if you vomit some will stay down, and go towards keeping you hydrated.

Think about tummy bugs - people cope with them vomiting for several days, and sipping fluids, it's when it goes on longer or you can't drink at all, you need to go.

For me, I was vomiting 5-10 times a day, as well as absolutely being unable to bring myself to drink barely a drop.

Hope you feel better soon. Do go if you get worse, IV fluids help a lot.