For over a month now I have been trying to extend dd's naps past the 40 minute mark. I use the paci to get her back to sleep. I thought by now she would begin to sleep longer on her own without my intervention. She will wake up crying, sometimes the paci is even still in her mouth. I figure she must have tummy pains or gas as she is squirming around a lot of the time. What can I do for her?