6 weeks and cluster feeding how to keep up?

Anne
Hi mamas I know LO is going through some growth spurt again at 6 weeks. My question is how can I keep up? I'm EBF and it seems like I can't keep up bec he would feed every hour or less (often spits up too so nothing stays in to keep him full).  So if I try to feed him again it seems like he is not getting anything n he will cry.