Things I am dealing with !
Had a similar instance occur a few years ago. We have owned a certain piece of land for over 60 years now. The adjacent property was sold and the new owner got a survey that was showing they owned land 8 feet over onto my property. We had a fence in place for over 60 years I have a shed also close to that boundary. One day the air head wife of the neighbor who was not much brighter was out front with a skid loader pulling up my corner post and telling my wife we may have to take down our shed! The sheriff was summoned and stopped them cold. We knew for a long time the surveys in this area are off and that they should always measure from the railroad not the properties to the west. Did they listen NO! It all got sorted out but I did lose some sleep like you talked about. VERY AGGRAVATING!