Pregnant and dreamed of having baby girl

Well, Im about 17 weeks pregnant now, And I really want a girl. Ive been having dreams that I get a ultra sound or the baby comes out to soon and that it is a girl. And I was wondering if this means Im having a girl? I heard that most pregnant womans instincts are right. My parents think im having boy cuz my butts big and im carrying low..
Please tell me what you think..
Today I got a ultra sound done and the baby was bent over with head on uturis or where in there and it was a sidewaze picture I can kinda see parts but its hard to really tell the legs are open and the babys squatting looks like no boy parts but now sure..