S.B.
Hey ! My daughter is 4 weeks too ! Born on June 13th, and I have the EXACT same problem ! at night shes like a totally different baby! I wish I knew,I'm about to get a different doctor cause the one I have sucks. I have thought about reflux though as someone suggested, its a possibility but if thats the case she should be spitting up during the day while laying down. And during the day she barely even cries, but at night she can wail for about 2 hours...Good luck mama