Mine is making all kinds of groaning noises, TONS of grunting, sometimes crying/whimpering in her sleep (although not as much since we started the Zantac a few days ago). Often she makes a screeching tire kind of sound, and sometimes she sounds like a seagull!
I know babies are noisy when they sleep, but does your newborn sleep soundly? Because mine doesn't at all :-( She's 2 weeks old.