Sunflower, take a look at this site: http://www.health.ri.gov/hsr/bmld/complaints.php

You can call here 1-800-942-7434 to get an idea about whether your neighbor's behavior fits within the regulatory scheme. The disciplinary duties, of course, deal primarily with her ability to treat patients. What she is doing seems to indicate she has a mental illness and may make her unfit. If this person values her license the filing of a complaint ought to get her attention.

Also, take a look here: https://www.ribar.com/Default.aspx You may be able to get a reduced rate or pro bono attorney. Sometimes, the Bar Association will direct you to an attorney that practices in your area of interest who will consult with you for no fee.

I would ask the attorney about the efficacy of a complaint against the psychiatrist. I also would ask about getting a permanent injunction against this woman barring her from harassing you and trespassing on your property.

I would also try to get a meeting with the chief of police to ask if there is nothing they can do to help you.

You may also consider talking to the city attorney to find out what evidence you would need to produce for the city attorney to consider filing a criminal trespass complaint against this women.

Apparently, nothing will change until someone gets this woman's attention big time.

Good luck.