My Ex Is Stalking Me Via Mutual Friends??

Found out that my ex has been asking mutual friends about me behind my back. She may have created an alternate Facebook account to stalk me or is using someone else's to stalk me. She knew that I had transferred to another university but she asked a friend of mine which it was. Therefore, she clearly had prior knowledge of my transferring (we went to the same college, but she moved away and transferred last year, while I transferred this year).

She's blocked me on Facebook, I don't remember her phone number or her e-mail and she's extremely unstable to begin with. What in the world do I do? I have no idea how long this has been going on or how many people she is getting info from.
My Ex Is Stalking Me Via Mutual Friends??
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