Conversion & bigamy

Myself age 40 hindu Brahmin lady Marriage 2006 (love come arrange) Hindu saptapadi My husband is (his father Muslim,mother Christan, he is raised as a Christian, he is baptised, he adopted Hinduism for our marriage) We started living like a normal hindu couple, doing all Pooja path, mandir and festivals 2009 forced me to sign nikaahnama, none of the family members from both sides were present or informed, very secretly done in an unknown place, one moulvi was present 2009 my devar also adopted Hinduism and married a Rajput girl 2010 my son born 2013 my daughter born 2014 Husband stopped shaving, kept a beard, started doing namaz, learning Urdu, behaviour became very aggressive towards me, by 2017 started going to Bhopal frequently to meet moulanas, his lifestyle became very suspicious, was never at home, stopped even coming in night 2018 secretly got my son circumcised,i wasn't even aware 2019 forced me to convert, i declined , threatened me of multiple wives, called me useless old barren 2020 declared his second marriage, left me with kids at my father's place, stopped me from going back to matrimonial home, 2024 he brought this woman from Bhopal to our matrimonial home she was pregnant and gave birth to a girl in May I don't know what should I do now, do i even have any legal rights, he calls himself as a Muslim now and says bigamy is legal for him, but our marriage was Hindu marriage, i am still a Hindu, he is super rich businessman and very influential, threatens me to not dare to go to court