Hello Juditha:

Your dream reminds me of the voice that told you to do everything in threes or else. Perhaps you're being told that you're communicating with too many spirits and an unfriendly spirit is trying to speak to you. Perhaps you should pray to God and say that I only want to talk to God and the beings of love and light who represent him.

I believe your dream was created by a spiritual being that really loves you and is looking out for you.

If that three spirit comes around again, tell it to find the light, and then start praying to God and Jesus and ask them to send some angels to help it cross over.

The deserted buildings could be a symbol for earthbound spirits. Desert-ed buildings = ghost town town, brick = earth.