Rules on family eviction in virginia

Live on family farm in house blt. for me. Mother told all family, nieghbors house is early inheritance. I am only heir. No rent, no deed, section not surveyed off. Have lived there for nearly 10 years. In dispute with Mom, age 80. Probably little dementia. Have family willing testify to harassment and earlier statements of early inheritance. She states now want to evict. Land in father's family for generations. Land hers through joint survivorship of father's deeds. Mom very disliked for years by most in community. Will she have go through regular eviction proceedure to get me out? Also, plan to file for harassment if she does. Drives through yard, intimidation, beating on windows and doors. Will also try file for diminshed capacity-- lot of evidence, threatened to burn house down. Police called. On a voice mail & deputy heard. Comm. Attory. decided not to pros. due to her age. Nitroglycerin in bird feeder, etc. Any suggesstions?