sorry to hear about xena i hope she feels, better. i have been going through very hard times with bobby a 7 month yorkie he's been in the hospital since last week and i just got him back home.
he also started with vomiting and was very weak, not able to stand up and his had was just down at all time. he's a little better. i would recomend for you to take xena to a specialist or internal medecine vet, they have more experience and they should know what to do. bobby was at the hospital from wed, last week until monday this week and at the hospital they couldn't find out what was wrong with him they did so many test i cant even remember their names, they even told me that i might have to put him to sleep. so i took him to a specialist and he was release on friday, he's still a lil down but the specialist told me that he'll get better in a couple of days.
hope my bad experience and the emergency hospital helps you.. i'll be praying for ur baby..