[Papa D]

We've got everything rolling with a private adoption - my cousin is an ob/gyn with a birth mom lined up for us. She's due in late July, we've got the attorneys going, birth mom has seen attorney, is interested in talking to us, everything is as GO as it can be four months out.
But we encountered a little glitch that's giving us some anxiety - the birthmom said we can call her on a certain day, and my wife did. That was yesterday and she didn't call back. Her 20 week visit to OB was Monday and she was supposed to learn the gender of the baby. So now we're freaking out, wondering - oh gosh, has she changed her mind, is she confused, is she scared. I realize it's just one day of not being called back by someone who is busy, working, and trying to run her life. What are we to think - that she's not calling us back because she has second thoughts? Do we back off and give her space or call again? Please help!