I've also heard of wrong ultrasounds. If we're having a boy, then he's going to be wearing a lot of pink and purple.
A few months ago, my husband asked the facetious question of what if she's a he? I told him that our son will be wearing a lot of pink. Andy said, half-jokingly, I think that his son was not going to wear pink. I replied with, "Said the dad who is wearing a pink shirt and has three more." He stuck his tongue out at me.
(He was wearing a bright pink, almost hot pink golf shirt and has one or two more and one or two pink button downs that he wears for work.)
From the moment I told him of the positive test, he was saying girl. The day before the u/s I was sitting in church, kinda spacing out. (I went to the contemporary service which is not my favorite, but I wanted to take Communion.) I was watching a couple of parents with a son who didn't quite look two. He was cute and fun to watch. I had had the thought of what if she turns out to be a he? Then I just prayed that we weren't too disappointed and just as happy and eager to greet him. I still think that on occasion.
For now, I am content with a baby, if he's going to be wearing pink and purple and ruffles and lace for awhile. (I do have some gender neutral clothes, too.) We've hardly discussed names, so that helps with a surprise, I think.
Okay. I'm done rambling.