Hi Chickpea,
I think this should go in the Dream Interpretation forum or the Reiki forum... Anyway, apart what you visualized, what did you feel physically? Did you feel lightheaded? did you feel as if you were wearing a crown? I often feel like this when my crown chakra is working properly, sometimes for hours at a time. You may have also been able to activate your third eye chakra, which is responsible for some very vivid imagery. I fid it easy to activate, I feel the spot in the center of my forehead grow hot, often during meditation but not exclusively, for example it often happens at night while I am falling asleep.
Some people say we have more than one gardian angel, a friend once told me I have three. I know the name of one of my spirit guides, I connected with him last February.
What was your aunt's name? Which day of the week were you born? These may me clues helpful to convey some information about your guardian angel. Yes, your aunt could be one of your guardian angels, or anyway an inspiring and guiding presence for you.
I sometimes have very vivid dreams, I often talk in my sleep as I dream to give directions or explanations, Sometimes very physical sentations are part of the dream and I wake up wondering whether it was something that really happened or if I just dreamt it - I now come to suspect some of these very physical dreams may actually be out-of-body, but have had not yet a chance to verify it.
I hope this helped somehow....
