I would go ahead with the appt tomorrow. If it turns out to be something serious, it will only end up getting more serious during the weekend and then you'll be shelling out a lot of money at an ER vet.
My first thought is that she's 5 months and might be teething and it's hurting her to eat hard food (is that what she eats? I shouldn't assume). I don't think throwing up one time is an emergency but if she is also not acting like herself (and you know best), then I'd at least pop into the vet before they close for the weekend...just to check it out.
__________________ Terri, proud mom to Mandie  & Shelby-Dale  |