Gender blood test..

Has anybody done the gender blood test and it come out wrong? My ob told me it was 100% accurate. But I’ve heard people say that it’s not. And I’m wondering if anybody has any stories about that? Because I keep dreaming I’m having a girl and idk, is it because I just really want a girl? They told me I’m having a boy, but it’s just like I’m still at that point of really wanting a girl😭. I will love this baby no matter what, I guess I’m just being over sensitive because I’m getting my tubes tied after the baby is born.