Do good spirits follow you?
Your loved ones who died can come and visit you as Ancestor Guides after they are healed, finished their life reviews, get adjusted to the Afterlife, and learn how to communicate with the living. They do not need to follow you, they know where you are. Your Spirit Guides, who are your teachers in many lives, are always with you. You also have Guardian Angels watching over you, they know where you are at, they are attuned to your frequency and know when you need saving or healing. They are not near you all the time, but they come when needed or when you ask them.
Spirits who "follow you home" are usually NOT good ones. You can pick up a spirit of a dead alcoholic in a bar and it can follow you home and make you want to drink alcohol. You can be at the scene of a car crash and somebody who just died can follow you home and become your house ghost, causing all kinds of problems or health issues. They are not supposed to be there, they need to go to the Light. These types of discarnate beings are not around for your highest good. One of the reasons people put a horseshoe at the entrance is because ghosts do not like iron. Many religious symbols are used for protection. In Christianity, Judaism, and Islam, Archangel Michael is usually the protector from any dark forces or ghosts.