my baby boy is going to be 5 months in 3 days, he is getting troubled while sleeping in night. before one week he use to sleep around 5 or 6 or sometimes before 8 easily while feeding, but for one week he is crying badly for 2-2 hours then able to sleep, he too avoid feeds while crying, and as soon as he gets sleep around 10 after 10-15 mins again cries badly in sleep and then sleeps on lips.. why is it so happening, he is teeting too, getting too troubled throughout the day.. and his doctor too didn't suggested any medicine, said it's normal