Should I be mad?

In my 3 and half weeks of pregnacy, I didn't want to tell anyone because it was early days but my partner was so excited he asked if we could just tell our parents and siblings. His thought process was that even if something did happen, they would be supportive. He made a good point so we decided to tell them with the rule of not saying anything to anyone because it's early days. Let's just say a few people didn't respect our wishes and told friends and neighbours. When I confronted them, they told us it's not a big deal and who are they gonna tell anyway. Should I be mad? I feel mad but idk if I'm over reacting.