I just got the boba/sleepy wrap to wear LO in during the day, but when I put him in it he screams bloody murder. I have him in there right and it feels comfortable, but he stretches his neck and head back and cries the whole time he's in it. I thought babies liked to be worn and close to their mommas? He does great in the ergo but that's too uncomfortable for me to move around in during the day. Any advice on how to get him acclimated to the wrap without it stressing him out?