Hi.
My small 6 week old (now 6lbs 13oz) generally has a period of cluster feeding every day, though not always in the evening. She feeds on and off for a good few hours most days at some point. She also tends to spit up (quite) a bit after each feed - so my question is can she really be hungry/have room for any more if she's spitting up? Or is she just after comfort (which is of course fine :) ).