I feel betrayed by my MOM

I had a mc in 2010 at 22+3 weeks. Now my bro and sil are pg and everyone is super happy. (Myself included) tonight I told my mom how hurtful it is that she doesn't acknowledge my child existed. Nor was she excited when I found out. Tonight she told me to "get over it already it was just a miscarriage." Is it ok for me to feel betrayed over this... Idk how to feel anymore