I use to dream of cockroaches all the time and sometimes spiders; the cockroaches made me feel depressed/hopeless and the spiders frightened me; the cockroaches were associated with my messy apartment of the time (when I actually had cockroaches) and not being able to clean up and spiders seem to have to do with trying new things or being "brave" (my dx was anxiety-related).

Dreaming of water, water is supposed to represent the unconscious and emotions I think.

http://www.huffingtonpost.com/2011/0..._n_891682.html (water)

http://www.huffingtonpost.com/2011/0..._n_891641.html (bugs)