last night my 7 week old was awake between 5pm and midnight, then between 3 and 4.30am ,then again between 5 and 6.45am .for some of the time he's unsettled and at other times he's simply wide awake. Any ideas? It's like this most nights and it's driving me and DH potty. Our 23 month old wakes up between 6 and 7am so I spend the day desperate for sleep.