Did you grow up in an environment that frowned on interacting with dead people? If so, perhaps you still have a lot of negative tapes playing in a continual loop in your head right now. They might sound similar to this:
"all spirits you encounter are demons impersonating the dead"
"you'll get possessed if you communicate with the dead"
"you are in league with Satan if you communicate with dead"
"you will go to hell and burn for ever and ever for that"
If you've had that kind of brainwashing, it is not helpful to you in understanding your mediumship ability. It will take a while for you to "deprogram" and clear your head of thoughts like that and the fear they inspire within you. But the more you work with and understand the spirit realm, the more you'll see how ignorant and fear-based those recordings truly are, and the easier it will be for you to let them go eventually. I did.
The dead for the most part can be a source of comfort, wisdom and enlightenment (though some of them are sheer assholes --as in life, so in death). Cultures in every part of the world have always relied on the spirits in this way, and consider the dead to be an important part of the continuum of life itself. Honestly, I don't think the dead people who approach you are "evil," or even have any ill intent at all ...annoying maybe, but not evil. My guess is that they know you're a medium, so they approach you. It's like if you were in a foreign country and you hear someone speaking fluent English. You gravitate toward that person out of relief, "at last, someone
who will understand me." That's how the dead feel when they sense a medium's nearby.
I suggest you focus on other parts of the spirit realm for now. Consider working with animal spirits for a while, rather than human ones. Deal with knucklehead human spirits later. Say, "go away, knuckleheads" if they come near you, and just ignore them. Realize that you run the show. You have to take charge of your energy field and your environment. So tell
, not ask, the human spirits that they must take their leave of your presence for now, until you say it's OK for them to return. They come to you because you don't set any boundaries. Tell them you will be focusing your energies on working with animal spirits for the time being. Once they see that you're not paying attention to them anymore, they'll stop coming around as much, if at all.
Then, spend some time in nature: go to a zoo, or hang out in a park, and just watch the animals. Tune into their energy. Try to read their thoughts and emotions. Get a journal and draw pictures of animals that stand out to you, that "speak" to your spirit in some way. Write notes in the margins of what they seem to say to you. If you have a pet, read its aura. Put your hands around its auric field and try to sense it. What do you see? Pray for its well-being every day. Send healing energy to the animal through your hands. What does that feel like?
Consider purchasing an animal oracle deck
about animal spirits, and learning about the unique wisdoms and messages different animals bring. Here's an article that may be of interest to you: The Call of the Spirits
For now, let nature help strengthen and empower you, and hopefully, help heal your fears.