9 weeks and 3 days

I haven’t seen my ob to get a ultrasound I’m appointment not till the end of August by that time I be 15 weeks why is my appointment so late I see a lot of people talking about there9 weeks or 8 weeks and they gotten there ultrasound I’m over here waiting but I’m anxious I want to here my little bean heart heart I want to to the doctor and they tell me it’s a healthy baby girl I have a 9 year old son he wants a sister and I want a daughter my husband wants a daughter we over like what ??? Come move my appointment up already