Even if she does not know what she wants in regard to relationships, that does not prevent her from acknowledging your message.
She had had a chance with you and may be regretting what had happened. That does not in itself indicate that she would want to rekindle the relationship. At this point, you've got to figure out what you want (do you want to put your life on hold w/o the guarantee that she's thinking of coming around) It's been five months and if you have not heard from her on her own initiative in any way, it may be best to keep your options flexible and move on. If she contacts you again, there is no guarantee that things will work this time (she may still have her own issues to deal with and you're not expected to wait indefinitely for her to straighten them out) She may have an issue with commitment and trust and she alone has to manage these within herself before she is ready for a steady relationship. Past behavior is a good indicator of future behavior.