hello.. my baby is 21month old.. we stay in my parents house from his birth.. recently when I took him to his dad's house he cried and cried for my parents and within 4days he stopped eating completely and got scared for simple things and he even forgot to smile.. so I came to my parents house again.. but we can't stay here long.. whenever I talk to him about going to his dad's house.. he gets completely scared and cries even in his sleep.. please help.. I am scared that changing places might affect him psychologically