Evening update?
Did the vet say which part of her gut is full? Is it just her stomach, or is there some in her intestines? Did he see much gas?
I'm shy of gut motility drugs because of a bad experience and I know Ra7751 doesn't like them either. But they do seem to work sometimes... I personally would wait to see how she's doing tomorrow and call the vet for a phone consultation before giving more Reglan. The vets in my clinic that like gut motility drugs (two of the three rabbit vets, the other one only gives them in pretty desperate situations) seem to mainly give out one dose and then reassess the situation before giving the next dose. That's probably the safest way to go because even if there isn't a blockage now, one might stillform since they tend to be a symptom of stasis. The best way to prevent that is lots and lots of fluids to prevent stuff in the gut from getting dried out.
I would definitely syringe more fluids into her, and simethicone/gas meds could help relieve some of the discomfort. If the vet said that her stomach is pretty full then I wouldn't syringe food into her for tonight because you don't want to add more to that, it'll just make her feel more uncomfortable.
I hope she feels better soon!