[yorkie mad]

As some of you know my baby had a bad belly 5 days ago , vomiting bile, jelly like blood in poop and vet said she had gastro, got meds and been fine UNTIL THIS MORNING! She was sick bile again although normal poop but there was a worm in her vomit! Grossed me out. Shes not due for her next worm tablet for another 3 weeks but I hope I did the right thing and gave her one anyway.Her last one was in Feb. Do you think that was ok? Do you think that was the cause of her gastro? She has Milbemax tabs that covers all types of worms , it looked like a round worm to me. I didnt think they could get roundworm at 9 mths old. Any feed back will be helpful.