You can by a battery operated bear in the infant toy section of dept stores that makes sounds like a mothers womb. ( I can't remember the name of the bear). We had one for Shelby when she was little and it worked great. We put it in her bed with her and she snuggled with it. Of course when we got Seymour, he had his big sissy to hang out with so he didn't need it.
Maybe it would help you, too!
Good Luck!