So sorry to hear poor Olivia has had this setback, but glad to know that she is on the mend now having been treated so promptly.
I agree that any change in GI or other behavior can be serious and should be vet checked ASAP. Early diagnosis and treatment can often nip any issue in the bud and prevent symptoms from becoming very serious. It is well worth the cost of a vet visit as diseases that are left untreated can be horrible for the dog and very expensive as well! Get well soon Olivia. You are a brave little soul.