How can she STILL view my facebook page?

I have an ex friend who I don't want to see my facebook page so I put my privacy settings to friends only in everything. I've selected my friends very carefully and have a very unusual password that noone knows. How is it that she still knows everything that goes on on my page? I've racked my brain and can't come up w/how she's doing it. Can anyone help me out, pls?