Baby Girl ?!?!

Yesterday I had my ultrasound done. Of course, its always way cool too see the baby, the heart, the spine and all of that. And I had been praying and praying that baby would cooperate and show us what they were, but baby was more uncooperative than we had hoped for. So, the technician tried a number of times to get the right picture to determine if it's a boy or girl. And the pictures she did get, which weren't that great said girl, but because they weren't the exact picture, she (the technician) said probably a 70% chance girl. Well, and really no matter what they are never 100% guarantees on the ultrasounds and the sex of the baby. The other thing she said was that because the baby was super active while she was working on the ultrasound, usually if it's a boy when they are that active you would see that it's a boy. So, going into this ultrasound I really built myself up to think it's a boy, since we have 2 already...so I was really in shock and I'm still kind of in disbelief and afraid to go for girl things because it's only 70% or so, and if I do go for it, and have a boy in delivery, I think it will be really hard for me to adjust to that idea. Not that I wouldn't still totally love the baby, but change isn't always easy - especially for me :) Anyhow, I had to get some of my thoughts down and welcome any prayers or suggestions :) I don't think another ultrasound will happen unless determined medically necessary...so Lord, I need help to know how to be and think now.