dream

I always seem to have recurring dreams about swimming pools. Never the same one. Sometimes they are empty other times they are full. If they are full, they seem to be overflowing most of the time. Other times they contain gross water. It is weird because sometimes I fall in in my dream and other times i don't. I never drown or anything like that i just get out. The most recent dream i had involved a pool and a bunch of people and when we went to this pool everyone jumped in but something was holding me back and i didn't go in because of a strong feeling somegthing was wrong. It turned out to be contaminated or something because i thought "i was right!" It is so weird...There is no pattern besides its swimming pools. I don't know why I have these dreams. I still enjoy swimming (when im awake) but empty and dirty pools creep me out. Any ideas?