You, as a Catholic, can’t use contraception. But if your husband uses it, there is little you can do except pray and keep the lines of communication open. Don’t lose hope! Several protestants are beginning to shun contraception. I know there is a fairly popular book out there written by a protestant minister, but the title escapes me right now.
You might want to pick up Kimberly Hahn’s “Life Giving Love” for support. It is a gentle, wonderful book. I wish Kimberly would write more books.
And lastly, I understand what you are going through. When I married my husband we were both atheists. I am now a Catholic and the whole contraception thing has been very difficult for us. My husband is a wonderful man and a great father… but he just doesn’t get the whole thing. He would never ask me to use anything hormonal, which he believes is dangerous, and he would never be permanently sterilized, but he can’t understand why barrier methods are prohibited. sigh And I am not perfect either. I follow the Churches teachings, but honestly I sometimes don’t understand them completely. I just keep praying for strength and perseverance.
Wow, did I answer your question at all? LOL!