I felt the same way when we were getting ready to have DD9 tested when she was 6. I was convinced that it was all in my head and that the numbers wouldn't match what I thought they would be. And, when she was first tested at age 6 she didn't make the DYS cutoff and I was crushed because I had seen it as my only hope of ever understanding her or finding help for her. However, 2 years later with a tester with more experience with gt kids she easily made it and is now a DYS.
I too get stuck on trying to figure out what we will do with her when she is ready for college at age 13 or 14 and not worry about puberty issues until someone brings them up. I think it is my mommy instinct that tells me that puberty will be easier than all of the other things that we face with her. (Ok, those of you with older girls can stop laughing now, let me live in ignorance for a little longer
)
My advice to you is to take a big breath, or two or fifty and just let it happen. The numbers will say what they say - you know your kid better than probably anyone and your gut is probably right.
When we radically grade skipped DD this year everyone else was worried about the puberty thing too, except me - and I was right, she knows that the other girls are starting puberty and she isn't yet, but she also knows that part of their behavior is because of it and she is glad to not have to worry about it at this point in time.
Good luck - this feeling too shall pass.
