Is there anything I can do if a competitor copies my content word for word? And to make matters worse, who used it in three different sites ,

i have emailed the person and explained the duplicate content could affect both our websites, but I doubt they will do anything ,

any suggestions?

do you have proof that the content was created by you?

if yes, then go here, they can take down the website within minutes if you provide concrete evidence that the original content was your.

http://www.dmca.com/takedowns.aspx