You can repeat the calcium or Tums after 24 hours if she has not laid or passed any lash egg material. She sure has been passing a lot of watery yellow droppings. Is she still regurgitating? Usually they only do that if the crop is getting sour. I would suspect some reproductive disorder or infection by all of the yellow droppings. Liver problems are also sometimes a reason for the yellow droppings. Does her lower belly under her vent feel enlarged? Will she eat some if you hold it under her beak?