if its all day, you have hyperemisis. im going through it right now with my second baby. i went throught it with my first. i vomited after every bite, or drink. I lost 18 lbs my first trimester. they have medicine for the nausea if its really bad

at least drink something, preferably Gatorade since that will give you electrolytes, and then eat when you feel that you can keep it down.

my ex hated my morning sickness, I'd always throw up after I ate so I used to make a bacon sandwich, eat half, throw up, then come straight back for the other half (obviously brush my teeth) and I kept it down fine, but everyone is different x