help please - ds is 4.5 months old now. He's had a sore throat/cough and a nappy rash for a week now (both getting much better) and has turned from a reasonable sleeper (down at 7, up once or twice for a feed until properly up at 6:30) into a real pain. He's literally up every two hours throughout the night - and not just for a quick feed, either, but a one hour suckle-fest!
He's fully breast-fed and sleeps in his own cot next to our bed, though lately he's been sleeping with me as it's just too knackering to get up all the time. He's good at going to sleep on his own and will happily lie awake in his cot for a while before dozing off, so it's not like he can't settle himself. He's no great daytime sleeper, a few cat naps (less than 30 minutes) here and there and that's it and feeds very frequently during the day still. I don't really know what to do - he's been much more demanding that normal recently and it's very difficult considering I've also got a 4yr old dd and a 3yr old.