I've also recommended taking magnesium to several other people, and they've told me it worked well for
them too, very soothing.
(One reason babies
get all floppy after nursing or getting a bottle of milk is that their stomachs are full and warm, but also because of the magnesium in the milk.)
I know you're having a hard time, but hang on, and see the baby's doc about your post above. You are handling a lot, so just know that we're sending all good thoughts and wishes.