Thank you for the additional information. The great majority of those foods consists of seed. Her shaking and spraying crop contents is likely to represent vomiting (rather than regurgitation) and that's worrisome.
A bird that bobs its head up and down in a sort of pumping motion, beak open and then a purposeful delivery of partially digested food is regurgitating. This is something they would do to feed offspring or a mate. It’s done by some birds to objects (toys, mirrors, people) they are particularly fond of - especially if they’re in a breeding season, when a bird wants to please their owner and/or is of a nervous temperament. Regurgitation that is unusual enough for you to make note of it like you have, might be a symptom of crop infection/impaction and a bird losing ingesta in that manner will become malnourished.
Vomiting is more of a head “flicking” event. The bird will often seem uneasy, pacing or uncomfortable and although the head bobbing might be similar to the regurgitation action, it’s usually more of a shaking and the end result is a very splattered, sticky substance that may or may not include food. When there’s blood showing in the vomitus it may indicate esophageal or proventricular ulcers.
An avian vet (please see here: www.aav.org) will take a look into your bird’s mouth as part of a thorough physical examination and is likely to examine a swab of the oral cavity for abnormal numbers of either bacteria, yeast, or parasites. A good exam will also check for any growths or tumors.
Vomiting is a more serious symptom and seeing a vet as soon as possible is important.
There are far too many possible diseases to list here, but as in any case of illness, getting it evaluated, diagnosed and treated right away is often the best outcome at the lowest cost. I would be more comfortable knowing that she was examined by an avian vet.
A common cause of vomiting in domestic birds is gram-negative bacterial infections which may have proliferated after a bird is stressed. Stress can involve molting, changes in their environment, being frightened, having their sleep hours reduced or other changes in schedules or even a difference in food. Another possible cause is contamination of food or water by fecal matter. Please continue our conversation if you wish.