My four week old has had a terrible mucusy cold since four days old, not seeming to get better. It may just be a cold but wondered if babies can be allergic to breast milk?? Also I have a dairy allergy which makes me very mucusy and wondered if this could be getting through to her in the breast milk if she has a dairy allergy, gonna buy some goats milk today for my sins and come off dairy - does anyone have any experience of this?