Telling others

Ok, am I wrong to feel completely disrespected by this? Ok, so my child's father told his friend whose "maternal" (she's like 16) that I'm pregnant. And and I knew they were going to talk about it when the got up and started walking away to have a "secret conversation" but she fu... lies and says they're talking about her. Of course they were talking about me. Then they sit there and secretly talk about my health and she's referring to my child as hers. I mean, I get he was trying to help, and maybe she was too, but am I overreacting.