DD (nearly 12 months) has never being a "good sleeper", she sometimes sleeps 8 hours straight and then the next night she will wake every hour [fhmm). No matter what type of night she has had, she wakes religiously at 4am and I am exhausted, I have recently returned to work so I have therefore lost the ability to nap in the day when she does. Is this something that she will eventually grow out of or is there anything I can do?