I went to bed last night feeling calmer about the whole situation. A fellow blogger was kind enough to consult Dr. Google, and she found an article that might be related to my situation, and yes, two dead fetuses can contribute to a high AF.P level.
Nevertheless, the gods were good to me. I got a call from the MFM place and they moved me to tomorrow at 1:00pm for the scan. I had to cancel two classes, and DH will have to leave work for a bit, but we'll be there for 1:00 and will hopefully get some answers.
I used the baby doppler about 3 times yesterday. I was a bit of a wreck when I got home yesterday afternoon, so hearing the beating heart kept reassuring me that this little bebe is ours no matter what. My pup was also right at my heels yesterday, comforting me. I know it may sound strange, but I swear this dog just gets me.