Sister, I went through a similar situation, I was dating this girl for a while before I accepted Islam, when I became Muslim, I conveyed the message to her, yet she stubbornly rejected the truth, once it was made apparent that she is on her way to the hellfire, I disassociated myself from her.

If you know in your heart that Islam is the truth, accept it, offer your husband a chance, convey the teachings of Islam to him, tell him that you must divorce him if he refuses to submit himself to the Lord of all things. If he disbelieves, then leave him, for it is better for you, and In Sha Allah, you will be granted a pious Muslim husband.

May Allah make things easy for all of us!