My baby (almost five weeks old) burps a whole lot. After feeding I always burp her. And try to get at least a second one out. But up to 45 minutes after feeding she makes sounds as if she's struggling (eh, eh, eh) and I hav to pick her up for a burp. SOmetimes the poor little thing makes short sharp cries as if in pain and when i pick her up its a big burp.
Sometimes the gas/air/wind comes out in a forceful woosh of poop.
Does your baby burp a lot?