DD is 4 months, usually a good sleeper, going down at 9ish, and waking twice for feeding before getting up at around 8.30am. She has had a cold for a few days, blocked up etc but still not been too bad. Tonight I put her to bed half an hour earlier, and she's woken every 1-2 hours, not particularly wanting feeling but not settling to sleep. It's now 5.40 and she's wide awake talking and babbling to herself. Have come out into living room as DH is sleeping. Why is she so wide awake?! She's usually such good sleeper! She's not crying or in pain, what's going on!!!!!