i think to make this more powerful, you could go all the way through six days. leaving the seventh out would allude to success, maybe. especially with the title talking about 7 days, stopping after only three is selling the idea way short, less than halfway.
besides, i want to see what other ideas you come up with...
besides bjork's "hyperballad" (a favorite of mine, BTW), there is peter greenaway's film "Drowning by Numbers" which would be a great resource to consider if you want to continue this poem. besides, michael nyman;s music is fantastic to listen to when being creative, like writing and painting, etc.
here's the imdb link to the film:
http://www.imdb.com/title/tt0092929/
i really would like to see more work on this; i hope i do get the chance before i die. ;P