In addition to the other great advice here (seeking a spiritual director, retreats with religious orders, vocation information fairs/days), I would recommend trying to engage in some elements of religious life that may be available to you as a young laywoman, such as:
]To the extent possible, and according to your personal needs (e.g. whether you have a job outside school, what your family's schedule allows), make and keep a reasonable daily/weekly schedule of activities. Try getting up around 5-6am and going to bed by 10-11pm. In between, schedule times for prayer, school, exercise & recreation, work, family meals, household chores, and so forth. *Your schedule will, by necessity, be considerably different from a religious sister's, of course! And any schedule you make will have to be somewhat flexible to accommodate other people, special occasions, and so forth-- don't get rigid about this. But you can try making and living by a reasonable schedule. :)
]If you do not already do so, try praying the liturgy of the hours daily-- at least some of the hours, such as morning and evening prayer. If you don't have books, or access to a LOTH-based devotional such as *Magnificat magazine, there are some free resources online.
*]If you have access to adequate transportation and a church where this is possible, attend Mass and/or Eucharistic adoration daily, or at least as frequently as your circumstances allow.
The idea here is to bring some practical, everyday elements into your discernment and decision process, because things like retreats with religious orders or diocesan/school vocation fairs don't happen everyday. If you have a spiritual director, discuss some elements that might be appropriate to you and your circumstances. :)