Sleeplessness of my child. Solutions.

Doctors, i need to know whether there is any effective treatment in ayurveda for delayed bed time and late night screaming of my baby.. I tried homoeopathy and alopathy. Melatonin syrup is given. Even then he is waking up after 1 hour of sleep and screams for hours. He is very difficult to console. Restless, shows resistance to settle down to bed and also eat. Digestion is almost ok..but sometimes  stool is hard. He started walking on  6 april.2 years old..havent started talking yet. After waking up he pass urine and gets some relief. I am 8 months pregnant and it is difficult that he needs me whole night and doesnt copeup with others. He is active during day time, sleeps without any irritation during day and doesn't even cry before sleep.but at night when he feels sleepy he starts crying and very difficult to settle him down. What should i do, i am fed up. Lost all the hope that he will start sleeping at night. Please tell me some solutions.