Cat vomiting stops then started up again
Two nights ago around 9 pm, my cat ate her wet food too quickly and immediately threw it up. She threw up anything she ate after so we removed her food but left water. Eventually she stopped around 3 am (she maybe threw up 6-7 times total), but we still didn't feed her until 12 hrs after her last vomit to let her stomach get a rest. Around then, we fed her a spoonful of cat soup every 20 minutes, then bits of plain shredded chicken. I also left out a VERY small amount of dry food overnight. 664
She didn't throw up any of that. Then this morning, I fed her a little bit more shredded chicken and she threw it up (but none of her food from last night, which tells me she must've digested that).
During the original vomit saga, she was a little lethargic and less talkative, but mostly seemed scared of what was happening to her. While we were feeding her soup last night, she was completely normal and playful. She is still using the litterbox to urinate but hasn't pooped (however she had a normal poop literally moments before the first eating too fast and vomiting). Her nose is damp and she shows no other symptoms besides looking really angry at me right now.
My question is -at what point do I take her to the emergency vet for this? I've been advised to just do small liquid-based meals spread throughout the day which she responded well to, should I just keep doing that or is this morning's vomit indicative of a deeper problem? And how soon should I increase her food volume to get to her original food intake (1/4 cup Iams healthy adult & 1/4 can of Fancy Feast cat foor 2x a day)?
For detail: she is a 6-7 y/o DMH, 8 lbs (little, not underweight), no known health problems aside from blindness and partial deafness. Has access to plants but only noms on my spider plant and i can't find any new bite marks on any others 664