Thank you SO much for your responses! I truly appreciate all your insight and advice!
Just to clear a few things up...
I HAVE been a sister in my sorority for about the past three and a half years... so I was a member. We are local and we are part of Panhel. I was talking with a friend of mine who "resigned" (we actually use the term desisterize in my sorority! haha) from her sorority and they told her she wasn't allowed to pledge another sorority unless it was local. So I was trying to figure things out based on what she told me, but everyone here seems to know a lot more about the subject which is great!
I'm not sure if anyone's insight changes after knowing this, it seemed like some people thought I was only going through initiation and was not yet a sister. Is there a place on the internet that I might be able to see the rules? Or are you fairly confident that I would be qualified to go through rush? I just don't want to feel dumb for trying! Haha.