Ugh my mommmmmm

My fiancé and I just got engaged a few weeks ago & im 7 weeks today. We had fertility issues that I haven’t been open about with anyone. We are waiting til we have our family dinner next week to tell everyone. Well today we were at my parents house & my mom made a comment ‘now that your engaged PLEASE wait until you’re married to get pregnant. I don’t want to deal with anyone being rude to me about it’ and she just kept going on and on and on. I’m really upset because I was so excited to tell everyone and so excited because it took us sooo long to get here. Now I just don’t want to tell anyone. I just feel so shitty and unsupported. I know she doesn’t know but I just feel like there is no reason to be so negative towards me.