dumb question about drinking with nothing on your stomach

so yesterday we had a day long cookout and i only ate lunch (a burger). i don’t know why i didn’t eat dinner. anyways, drank a couple of bud light seltzers, pretty small sips on moonshine. i was drunk but not totally hammered, i’ve been a lot more drunk before. at around 1 in the morning, i woke up shaking and so weak and nauseous. i had to get something on my stomach so i had some chips and water. i really didn’t feel like i was gonna puke until i did lol. but i felt great afterwards. try and go back to bed but woke up again at 5am even worse. just shaking and sweating. i just drank some water and my boyfriend tried to get me to eat some bread but it took everything in my power to swallow a few bites. then i threw up again and was fine. slept some more and woke up feeling okay- just hungry. i ate breakfast and everything went down okay lol

my question is kinda dumb but why is it that i didn’t drink a ridiculous amount but still puked? was it because i didn’t eat dinner? and why does drinking with nothing on your stomach make you feel miserable?