Family pressure to have babies

My fiance's family puts so much pressure on me to want children, and have children soon. They are very conservative, so I'm surprised they even entertain the thought since we are still a month away from being married (eye roll), but I'm worried it's going to get worse! Especially because we are buying a home, getting married, etc. I don't know that I want children, and I sure don't want them right now!! My fiancé would like to have children but he is content not to also. I just know that I will be the one to put my career on hold, and sacrifice the most when it comes to becoming a parent, and I don't want that!