So my son keeps doing his feeding cues so I keep getting my pillow and everything set up and go to breast feed him and it's like he'll eat for a couple minutes and start suckling and pushing milk back out of his mouth, pretty much like a toddler blowing bubbles with his straw til it spills out the top of the glass, my breast are hating me right now, any advice? P.s. he KEEPS spitting up but then cries for more milk