Hi BellymonsterMom,
I'm so sorry that you and Bells are going through all of this.
From your comment, it sounds as though Bells was a bit off before the vaccine was administered ("she was acting 'pooky'"), but she's really been through the ringer since.
Did the vet yesterday (Cerenia and sub Q fluids) tell you what to expect over the next day or so? If Bell's not behaving within that "expected" range, I'd call the vet to see if there is anything more you can do at home.
Katy ate grass every once in a while. Only sometimes did I suspect it was a sign her tummy was upset. Here's a
pets/WebMD article, "
Why Do Dogs Eat Grass?" Same publisher, article, "
Should I Stop My Dog from Eating Grass? If So, How?"
Keeping you in my thoughts and prayers.