The simplest answer to this in my own experience is yes, I have experienced presences similar to this in my own meditations, breaks in the spiritual quiet that I was enjoying etc. What are they? What do they represent?
Well, to keep my own response as simple as possible, otherwise I'll end up writing a book on here on the subject, the sudden intrusion that comes into the meditative experienced is drawn in, no other way to put that. Think of a ship on a quiet night's ocean, settled into a calm and slow move through the fog of the night time air, the ship itself being me or you at peace with its ocean passage. Whatever setting you are drawn to in your spirit is what you set to your thoughts and thus, it be-comes for you. In my own case it could be a forest, or yes, on an ocean, or possibly just in the ether.
Knowing you personally as I do, I can reliably say that your a spirit of a light-soul that literally acts as the lighthouse cutting through the ether that is across the veil. All living things, whether they think they are such dark and *EVIL* or whatever, are actually alive and well and thus, they shine with a spiritual brilliance that attracts dark entities, just like a lighthouse through the fog of the ocean, or set your own analogy to that if you will. All are the same!
The darker entities, that many sects of the Christian Church, and of course other faiths label as demons, demonic, devilish, black spirits, black shades, people can reiterate their own experiences with those labels, they are attracted to the living brilliance of our physically manifested spirits. You see, true "Dark Entities" for and by the most part have never existed as physical beings so they are highly attracted to us to experience what we do and who we are. You happen to be highly "psy" sensitive, as many of those who come to identify themselves as "psy" are. WE delve into the energy of the universe, we sense, feel, and eventually learn to manipulate the energy of the life that is within us and around us.
These dark entities know this, and are also drawn to our presence for that reason.
The protection?
Well, many have discussed this before, but the beginning, the middle and the end of the chain of protection is formed between you and your deity, "The Great Spirit" in some form for whoever it is and your guide(s) that are with you. Think and meditate on that protection and seek your guide, for me it is often a Raven, just what it is. For others, it will come to them and be represented in whatever powerful form that sits deep within the soul where it will facilitate great and manifest protection as I've also experienced discussed across much of our common pagan community.
The bottom line is, and this always elicits frank criticism from some in my direction, sorry guys but I adhere to this premise in my very soul!
If I truly believe at my core that I am protected and that nothing can cross my boundaries and that my protection is in a solid state, nothing will be able to touch me. That IS my belief and my core when I meditate, when I am in the ether of my spirit state.
It is as you said Larae, always un-nerving, no matter how little or how much we experience.
Sometimes I swear we just attract these things because they want to play.
Tell them to go find their own spiritual sandbox somewhere else! 8-) )
I've mentioned this sometime before, but, every year around the festival of Samhain at the full moon or close to it, I sanctify the boundaries of our house, just to keep away what you are describing. The inside of our house is literally sanctified ground warding off any ill entity that may dare to cross into my realm.
It works, I use sea salt in the border ceremony. That is why I needed it. For that very ceremony. ;)
Peace>
WD>