Thanks for all of the replies!
First off, I'm a sophomore, not a junior, and at my school there are quite a few sophomores who get bids.
Second, I didn't decline the bid. The sorority called me about two hours before bids were being handed out and said that they had a bid for me if I wanted it. I was in class at the time and obviously couldn't answer my phone. When I got out of class (after bid day activities had started) I called our greek life office and they informed me that the sorority hadn't technically offered me a bid and that I was not considered to have rejected a bid.
Third, I'm very involved with my school. I'm a tour guide, part of the choir and part of the social chair for school events.
So the overall consensus is that rushing again would be a bad idea? I was kind of expecting that