I have been working on breeding two of my budgies. But Blueberry (my female) is exhibiting weird behavior.

she is laying on her tummy a lot, as if she has eggs under there. She only does this on top of her nesting box, and she does it all night when sleeping and during naps at day. She has started to roll more and more until her face is close to the floor.

She seems really big, like a potato

she has been getting aggressive with her mate

she goes through bursts of walking around the cage in a strange manner and plucking at the side of the cage. (grabbing the bares, pulling, then letting go)

She also takes a long time to go to sleep after putting her in the dark. And wakes up here and there through out the night.

Is she just super hormonal? or about to lay?