My 3 wks old ds these 2 days quite haywire in his sleeping pattern. Now when we put him in the cot after feeding, he will wake up and cry abt 30 mins later, my MIL have to carry him and pat him to sleep and put him back in the cot again. Why is it like that? How we know babies have wind in their stomach and is it ok to put yu yee oil on him at this age?