Just wanted to share a dream I had last night, a dream that had a great impact on me and i'm not quite sure of what to think of it, but in some ways I do know what it means and what it told me. But I would like to hear the opinons of others as well

Alrighty then, here we go(Please excuse the grammar, english is not my native tounge):
I dreamt I was at an old castle/mansion of sorts. It was very dark and gloomy, it was also raining outside. I was indoors with a group of other people who were dressed in black robes(I was also dressed in a black robe/garb). We were stitting/standing(don't remember for sure) in this big room and there was a black horse(a mare) brought into the room, and someone told it to go to the one it deemed to be the most good-hearted in the room. I remember I looked upon someone else when this was said as I didn't expect the horse to choose me, but to my surprise it came straight up to me and nudged me in the face with it's muzzle. It had chosen me. I was told it's name was "Aoife"(I think, not really sure, but it sounded like "Aoife"(which by the way means "radiant" or "pleasure" in irish. This is quite interesting since i'm not irish myself, i'm swedish, but I am indeed interested in celtic mythology)). A while later I was led to where the mare(Aoife?) was stabled and was told to take her for a ride. And as I did that a black raven circled above us or stayed close by.
After this I woke up, almost terrified. But I couldn't say why as the dream was not a bad one, it was gloomy and dark as I wrote above, but other than that the dream was quite positive.
What makes this dream even more interesting is that the last couple of days while meditating, i've been asking for guidance and help towards my advancement in my spirituality. And I think I got it last night. A new spirit guide. I think I was given a horse to help me on my way. To ease my travelling in "the other realms" so to speak. The fear I had when I woke up might be the fear of letting go, of what might happen when I advance in my spirituality, or become more open. Anyone got thoughts on this?
Cheers and many thanks in advance.