Keep an eye on her, just like you are. Vaccines can impact cows in different ways, especially if she has never been vaccinated before.
Some are more sensitive to the vaccines. Symptoms I have noticed in my cows/calves are: some are stiff and sore for a few days, some
are a little lethargic, like the don't feel as good as normal. As far as the wormer, in horses if they are carrying a very large parasite load and
the wormer kills a large volume of parasites really quick it can set up a toxic reaction, that in rare/severe cases that could result in death.
She probably has never been handled like the average ranch cow before so it may have been a bit traumatic for her emotionally.
Her appetite maybe off a bit and she may associate the cubes with a bad experience.
It ain't easy bein a ranch cow.