Harassment by inlaws

My father in law, mother in laws and sister in laws mentally harass me most of the time. They threat me to leave their house without any reason. Even my father in law uses dirty words to me. They all know that I am pregnant even after they fight with me and mentally harass me. My sister in law is younger than me and she also says dirty words and fight with me. But my husband always supports me. He doesn’t even fight with me when this kind of things happen in my house. I have married with him from 2014. This was a love marriage against to my parents and I usually don’t include my family just because they didn’t accept my marriage with my husband. Now my in laws always harass me they think that I am alone and no one will support me against them. I am completely in stress just because of them. My MIL creates scene like a slum area woman that I have broken his family and his son is not listening to her just because of me. Please suggest what I can do legally against them but i don’t want my husband to hurt on this as he cares a lot for me. My MIL even don’t allow us to leave separate but I can’t even live with this stress by the things happens in my house. I am a working woman but everyday this kind of stress making me worse in my working life also. My in laws all are uneducated here and they threat me that they will kill themselves and will take my name to the police that I have done this to them most of the time my MIL and SIL uses this word that they will complain to the police that I want to kill them or I want to throw them from this house. I am very mentally tortured by them and sometime I afraid from this that if they do things like this what will happen to me. Please suggest I am in big pain. No one is in my life who can suggest me right.