Baby spit up


Ok my baby is 4 weeks old and spits up all the time, more so the last few days. This is my second and my first did not have this problem. He’ll spit up and then want more food and then spit up and want more food, it’s an endless cycle. He’s exclusively breastfed, not even a bottle, just boob. I’m at a loss as to what’s wrong or how to fix it. He’s not a big burpy baby even though I try. I don’t eat much dairy at all so that’s not an issue. He has an appointment tomorrow so I’ll be asking about it but thought I’d try here too.