So I haven't been feeling well

So, why is it when a woman says that she has been feeling nauseous everyone automatically assumes that she is pregnant? Honestly people, it is flu season, why can't a girl just say she doesn't feel well and people leave it at that? I guess the next time I don't feel well and don't want to feel like I am involved in the Spanish Inquisition (insert Mel Brooks joke here) I will just tell people that I am having diarrhea and tell people to shove off if they feel inclined to spew the baby blues my direction!