Mental harrasment by husband and in laws

I was married in May2013 and now have a six months old child. I am a govt employee and my husband works in an MNC. I have faced harassment by being looked down upon for various reasons by my husband and my mother in law and his other family members only worsen things for me. He listens to them only and does as they want. To avoid any fights I always ended up doing what he wanted but then also couldn't satisfy him. Last year I got promoted and was transferred to Mumbai which I got changed to Lucknow(my parents hometown) as I was pregnant. He said he was okay with it but actually later on when my son was born and he didnt come to see us or even ask for our well being, his father defended by saying that he wanted me to go to Patna. He asked us to invite him to see his child but till then I was just tired of his ego problem and so refused. I had transferred 6 lacs to my husband's account for a flat which he decided to have jointly with his brother. Also my mother in law is in possession of all my jewellery and whatever my parents had gifted me. My husband has now refused to refund me the remaining amt. of the six lacs. He now wants a pic of my son which i can't send as I don't want to share my new number. He is now contacting my relatives and maligning me. I want to divorce him but fear for my child. What if they manage to take away my child. He has gone to US for 5 months but didn't bother to meet us so why now? Please guide me...