My son is 17 weeks will be four months in two days and for the past few days has had periods of crying that are difficult to resolve about twice a day where the breast used to do the trick. He is more interested in playing with our hands or his bottle than in eating. He's been waking up every hour at night and is difficult to put down to sleep and only takes 15 minute naps. Is this leap 4 and sleep regression? It just seems a little early.