Divorce during pregnancy from irresponsible and abusive husband

I want divorce from my husband because he is not fulfilling my responsibility whether it is in terms of financial or moral.i m pregnant and residing in my mother's house after one month of my marriage after that he is abusing me in every manner.put allegation on my character and say I will not divorce you at any cost and never listen to you in any manner. Its his and family tradition to leave and make trouble of girl because my brother in law had 3wives all left him my husband has also 1marriage whose case are pending in the court. Please suggest me proper guidance for my case as my marriage took place only 5months what should i do I cant handle this mental trauma