I had a dream that me and a guy friend (James) were walking to my apartment (I was walking to his left) As we cross the street to my home, he points to his left and says "Hey, isn't that your cat?" (I had a cat that ran away a few months ago) and I look and I see a shadow of a cat, so I call to her, and as the shadow approaches I realize that it is NOT a cat, but a large black dog with one head a both ends. It was angry and barking at me, then it left. James and I reached the building where I live, and we both stopped because there was writing on the one wall of the building. It was the names and numbers of all the guys I used to like and they left small messages for me. My friend then told me that Jay (a fling I had a few years ago) missed me. And suddenly I realized that I lived next door to my first boyfriend. Then suddenly we (James and I) were inside my apartment. I look at the answering machine (in the dream was a huge Mechanical Clock) and it had three messages on it, so I press play and as I do instead of the messages playing it played my recorded out-going message. And for some strange reason it had 4 different full-length songs on it, and there was no messages. I laughed to my friend, saying that no wonder why nobody left a message; they all hung up. James didn't say anything to me and just kind of ignored me and I realized that my sister (his girlfriend) was there. They weren't saying anything to each other, and they were saying anything to me. There was a lot of tension in the air, and I felt very uncomfortable. Then I woke up.

Have you ever read any Greek mythology? The black dog reminds me of Cerberus, the 3-headed dog that guards Hades.