Adamant husband and mental harassment by his family members.

I am 21yr old . Last 21st Aug I got married to a 31yr old boy. My father was running a business which went in a big loss and we have to sell all the property to settle the issues. At this stage the boys father approached my father, convinced in repeated approach, that only the boy and his parents are only in their house. His two elder sisters got married and settled, I can rule like a queen for 60 crore worth property, all that were told by boys father to convince my father.the day before the marriage the boy came with a legal paper stating that none of my family members or I have rights on their property.all my family members signed it. After marriage he insisted me too to sign it, since from my childhood my father was in abroad and at the time of my marriage he lost all his wealth, we have the lost the interest in money, so without any hesitation I also signed . After marriage I understood both his elder sisters are near the house and they daily used to come and spend time or even stay for long days..and even his sisters sons too are being brought up in this house only . My husband is a tough guy. So instead of getting into a new married life everyday he started advising me to adjust with the existence. It is their existence in which I find it very difficult to move. Everyday quarrel, misunderstanding. I could not live there peacefully, not even a single day. He refused to register the marriage also.daily his mother and his sisters started to blame me for everything and when my husband comes from office they will start a issue ..he will shout at me and we will get separated..this is what happening in this past nine months.my husband started saying I have been selected to look after his people and not him.he stopped my family members coming to his house by ill treating them.my father in law took away my phone so that I should not contact anyone in my family or relatives.all his family members were double game players and I couldn't survive there so I told my husband many times let us be apart.in this condition I got conceived and now I am 5 months in my pregnancy. Now he wants me to get him a mutual divorce or if I want to live with him he wants me to be as a maid and serve his family members.now what should I do??