Like everyone else has said - you should check with:
- Your campus Panhellenic Council. They may have a minimum GPA to rush, which may make you ineligible.
- The sororities at your school, on the national level. All have minimum GPAs required for initiation; AEPhi's is 2.0 on a 4.0 scale, and is among the most lenient out there.
- The sororities at your school, on the chapter level. Chapters can set higher minimum GPAs than their nationals specify. Chapters can sometimes also accept grade risks, so if you have a 2.2 and the minimum is 2.25 and they really like you, they can still invite you back.
If you are eligible to rush, go for it. Most, if not all, sororities have academic programs that will help you bring your grades up. But you should be prepared to be cut heavily for grades.
If not, use the next semester or year to pull your grades up, then try again.
Good luck!