Meredith,
In regard to becoming an alumna, it is my understanding that if you leave school (and your dues were up to date when you left), you are considered an alumna. I could be wrong, but that has been my understanding. If you don't get a response from your advisor, I would check with your province president again.
I'm sorry that your sisters haven't been as supportive as they should have been. It sounds like you've been going through a lot and need their support. Have you tried to talk to anyone to let them know how you feel? I know that sometimes people back off because they're not sure how to act or what to say. Maybe if you broke the ice it would help some.
I wish I could be more help. At least know that your sisters on GC are supportive of you!
ZLAM,
Jackie
P.S. I had the opportunity to meet you briefly when you were talking to Barbara Purks at Convention.