This is not a normal cry. This cry indicates extreme sudden pain.
For example: If you were sitting peacefully somewhere and someone threw burning coals on your body, how would you scream?
She is swaddled and fed, then she goes to sleep, peacefully for an hour or so. Then all of a sudden she starts screaming like I described above. This has started happening frequently now.
Yesterday she was awake, happy, and gurgling merrily, and then the incident happened.
Though after some minutes she does calm down, but I am worried.
What could be the cause?