Ignorant coworker😤

So I found out I was pregnant about 4 weeks ago and it’s been slowly getting around my work (about 80 people) since. So someone just found out yesterday, and was talking about it, and this woman (I already didn’t like) overhears. Her first reaction, without any congratulations or as little as a smile is “are you really having a baby” she then goes on to refer to it my pregnancy as “a mistake like that” and over the course of the day says “the world doesn’t need anymore people” SEVERAL times. It didn’t really get to me since I already didn’t value her opinion much, but it’s just annoying how people feel the need to put a negative spin on such a miracle🙄🙄anyway excuse my rant😂