I am exasperated...my 4 week old daughter is exclusively breastfed but each night she goes through a very cranky, fussy period of about 4-5 hours where she wants to nurse continuously and she is VERY aggressive in her sucking. She acts very upset and can really do damage to my nipples - she also bangs her fists against my chest and flails about. I don't mind the long feeding time, but is there a way to get her to nurse more calmly so she doesn't do damage? Also, is there a way to boost milk production so that I will have more in the evenings? My supply is fine all day but at this witching hour it feels like my breasts are empty when she is at her hungriest...