Hi, my 4 week old is breastfed exclusively and over the last week or so she throws up spectacularly after every feed.
She's also very fussy and unsettled in the evenings and at night especially, like she has stomach ache and this is when the vomiting is worst. It looks like a whole feed is coming straight back up. But she's also screaming and rooting constantly.
Does anyone know what could be causing this? What should I do? Keep feeding when she's like that or try to hold her off for a while? After 5 babies I should probably know this but she has me worried 
I asked the health visitor for advice and she mentioned oversupply and forceful let down (?) but none of the suggestions she made to help have made a difference so far 