A video of her actions would be good - upload to YouTube and provide a link.
The BYC upload does not work, you'd have to upload to Youtube or a similar platform and provide us a link.I cant seemed to upload a video, it says that the extension is not allowed. As of now she is still jerking her head, and we tried to massaged her crop and neck up and saw bubbling in her mouth, clear bubbly stuff like phlegm but its clear we tried as much as possible to get it out whenever we hear her gasping for air by massaging her neck up then getting it out by swabbing cotton buds
Don't massage the crop and neck in an upward motion, you risk pushing the contents of the crop up into the beak, she could choke.
It does sound like she may be having some crop issues. I'd read the article linked previously and begin treatment.
Do you notice any swelling or fluid in her abdomen below the vent between her legs?