My 9 yr. old female Pug has recently been eating then throwing up shortly afterwards. In the last 2 days, though, she really has had no interest in eating. I finally got her to try again and within 20 minutes, she threw it back up. I can't see my Vet until Monday. There have been no changes in food. Should I wait until Monday (it's Friday night) or take her to the emergency vet? Thanks for any help. Lucy