Happy update! After a full month, Bella finally ate last night
She took an f/t pinkie without any hesitation and no regurge yet. I guess she just needed to get hungry enough. We're going to leave her alone (other than water change and tank maintenance) and continue feeding one pinkie a week for the next 4-5 feedings and see how she does. Once my home computer is up and running I'll post some pics of my girl.