need help with sick female cockatiel

Hello everybody
This is my first post and wish that I get some helpful tips

My female cockatiel is suffering from (calcium deficiency) problem after laying 5 eggs for the 3rd time this year. Now she can't even stand up and eat or drink in cage. Tried to drop some calcium soluble water drops to her mouth using (hand feeding syringe) but she keeps sneezing the medicine and spitting it out both via nose and mouth. Should I try to give her injection of calcium?
How should I do it and what's the OK dose to help her gain her energy back.

Thank you

Call the nearest Avian Vet and ask these quetions to him/her!!! Hope it's not too late! ....Goodluck!