homeopathic chammomila is really good for calming/soothing - you could try giving it to her (tiny pillule that goes under the tounge and dissolvles or there is a spray option from health food stores) as far as i am aware it is safe to give in new tiny bubs - but check it out.
i highly recommend taking bub to a chiro thats specialises in bub care - i took my dd who had breathing and a 4mth cold (literally 4 mth) and it was gone in three treatments. and i know others that have taken for sleep and settling issues - could be something paining her when she is in the sleep position or a problem with wind that can be easily remedied. (if you are in Melbourne i can give you the details)
Good Luck, it can be so challenging when your at wits end and only want best for bub.

