OK ladies today I have found out that one of my fiance's family is spreading the word about my pregnancy without my permission and I haven't even told anyone except close family ( moms siblings and grandparents)

Do you think I'm overreacting when I hear someone else is announcing my pregnancy to the world and I get angry?

When I confronted them they told me its not that big of a deal because everyone is going to find out eventually. I'm furious...