I assume you pledged AND initiated? When you left VSU, did you put forth a request for alumnae status or did you just 'leave'.
The BEST thing to do would be to write to
zetataualpha@zetataualpha.org to find out what your exact status is with the fraternity. If you are in good standing, you will probably just need to reaffiliate with the VSU chapter. Otherwise, you will just need to restablish your good status with the Fraternity then reaffiliate. You can be a member of the chapter for as long as you are an undergraduate.
Good luck!