Anyone else feel this way?

I know I posted something very similar to this yesterday on the CHSFS forum, so I'm sorry if some of you are reading for the second time, but I'm interested to hear responses and reassurances (if you have any!)

I know that my situation is different since I am a high school student and the child my family is adopting is my sibling (aside from Kelsey at http://www.afamilyoften.blogspot.com, of course!) but I was wondering if anyone else experienced similar feelings after receiving their referral. Ever since the post-referral shock wore off a few weeks ago, I've been finding myself "forgetting" that I have a baby sister in Ethiopia. This is in sharp contrast to when my family was in the beginning stages of adoption (I would talk/think about the fact that I would have a new younger sibling constantly!) I understand that it could be because of the typical high-schooler thoughts costantly on my mind- schoolwork, activities, friends, etc.- or the fact that finally being in the phase of NOT waiting for a referral is surreal. Yet I feel guilty. I talk about our adoption very often with my friends, who are always bombarding me with questions about what we've decided to name her, have we bought anything yet, etc.- but these conversations are detached from my sister herself. I feel badly that I don't think more about her, even though I know that everything will change when I see her for the first time. It would just help for me to know that I'm not alone in my guilt!