I call LO our one-man-band because of all the sounds she makes while sleeping. Sometimes I wake up thinking I just heard adults talking in the house but then it's just her.
My LO does this too, I don't think it's anything to worry about. If I hear him cry when he's sleeping I wait a minute to see if he continues or if it was a one-off. He also grunts and groans and whines in his sleep. This is why we don't have him in our room or else we wouldn't get any sleep!
Re: Baby crying