DD is just over 4 months old and for about a week now after i put her to sleep of a night she sometimes crys in her sleep, It's such a sad cry it nearly makes my cry! I go and check on her and she's always asleep.....She is a great sleeper though, she sleeps from about 9pm till 7am and has since she was 2 weeks old. So i guess my question is, is she having bad dreams? or is it something else?