Cat is throwing up: 3 vet visits in 3 days, in hospital

this sounds so familiar to my LILLI...she has been to vet three times in three days..today, was referred to a specialist and was admitted to 24 hour hospital ..she won't eat, won't drink and throwing up saliva..she was even throwing up while on anti vomiting shot..her blood work was almost perfect, her ultrasounds and xrays looked good..they gave her barium to see how fast it moved through her system..it slowed down near pancreas and duodenum, but eventually made it to her colon..they said she doesn't have pancreatitis and all of her organs look good..they originally thought maybe it could be a foreign object obstruction, but now he thinks it could be a big hairball...I feel your pain for not knowing what's wrong..I hope your kitty gets better..did they figure out what's going on??hopefully I'll get good news on my girl tomorrow

Hi and welcome to TCS! Any news on Lilli? How is she doing?