Sarah,
First of all, I'm glad you shared those dreams. I have extremely vivid dreams, every night, although they usually either fall into two classifications:
1) Frustration dreams—nothing works right, I can't get anything done, I'm naked or in my underwear and can't find my clothes, or I'm on stage, ready to perform but I don't know the music (I'm a trained pianist and have performed, always successfully), or I'm in class ready to take test but don't know any of the answers. Or I'm somewhere and get to where I'm trying to go. There must be thousands of variations.
2) Freedom dreams—I fly, go through solid objects (walls, etc.), breathe underwater, teleport from place to place, teach other people how to do these things.
When I have the frustration dreams, I don't know I'm dreaming. It's awful.
When I have the freedom dreams, I DO know I am dreaming, and they are sometimes fully lucid dreams.
Unlike you, I have never had specific dreams of other lives. However, I have found out that one particular aspect in my chart, Venus conjunct Saturn in the 12th, has worked this way in my life:
I'm terrified of people in groups. Already, when I was a child, I was afraid of other kids. Later I overcame this, had a fairly normal social life, but I can't stand being in a room full of people at parties, for instance. If I have to attend some kind of social function, I feel sick, sweat, get bad headaches and feel like I've been let out of Hell when I can leave.
I've been in places like NY city, walking around in huge crowds, and I had and have no problem because I don't have to talk to people. I've been well-liked most of my life, and I get invited places a lot. No one understands why I always "disappear". But I just have to get away.
When I interact with individuals, it's totally different. Then I often have a great deal of confidence.
Does anyone else have this kind of aspect in the 12th?
Gaer