My baby bird Maxima passed away this evening

im crying so much i can hardly type. We are so heartbroken. She was the most precious thing, her, and i had a special bond, i was teaching her to talk, and she would try to repeat what i said.
Last weekend we noticed her picking on a plant, i remember my son jumped up, and took her away from it. Last thursday we took her to the vet because she didnt look right, she was quiet, and just wanting to sit with me.
When i walked over to her cage, i saw her laying at the bottom, i touched her, and she looked at me, dropped her head, and was gone