The question comes up again and again: "How do you know if God is calling you to be a Sister or a Nun?"
There is no test that you can take. There is no inventory that you can fill out that will allow you to say for sure "God is calling me."
Some things point in the direction, though.
The video linked here is a fun exploration of the "Warning Signs." In a couple of days, we'll look at some things to consider.