how am i still vomitting???

i drank last night with my girlfriend and i had been drinking a good amount of water throughout the day. i cant remember how many shots of bacardi i took but it wasnt over 9. Im 21f like 5’11 200 pounds so thats not a huge number to me. anyways i didnt realize that i only had a bowl of cheerios yesterday and even though i was chasing with water i fell asleep not feeling the best. i wake up okay but after ten minutes i rush to the bathroom to hurl. only a little comes out, its mainly gagging. i brush my teeth, go back to my room and ten minutes later the same things so i run back. The second time sucked so bad i was like coughing because nothing was coming up. this is the third time, im writing this from my head sitting on the trashcan, why does this happen 😭😭😭 i know im not dehydrated, i dont have a headache and ive been drinking so much water. i an wondering if i should eat something? to maybe absorb what’s going on in my bellly? or would eating make it worse? what do i do? how do i make this endddd