Then I suggest the very first thing you need to do as a Prerequisite to anything is is write her a letter to immediately Cease and Desist
any ad all contact. That her behavior is annoying and harassing. State that if she does not stop any and all contact you will have no other choice but to file for a Restraining Order against her.
This letter needs to be mailed Certified with a Return Receipt Requested.
Once you have done that, and you get the receipt of delivery back from the Post Office, if she continues then take a copy of the letter, the receipt and tell the Clerk of the court in your county that you need a Restraining Order against this person
You will then have to have a person in Ohio file this in the court in the county where she lives in Ohio and have her served with it.
Now, should you not want to do all that, the only thing you can do is the letter and then if she shows up at your door call the police and have her arrested for trespassing
I suggest that once she gets your letter her behavior will change and she will not contact you because such a letter shows you mean business.