1) file police complaint against your husband under section 498A for dowry harassment
2) file police complaint of bigamy under section 494 of IPC if he remarried during subsistence of earlier marriage
3) engage detective agency and gather evidence of his adultery
4) file application for maintenance under section 125 cr pc
5) you can also file DV case seek alternative accommodation from husband , maintenance for yourself and child , compensation for mental torture undergone by you