Google Penguin and Panda Recovery, Best Way?

[Octavio]

Hi there,

I started a new site. I did all the basic SEO to it. The site's traffic started growing fast, and it was already generating about $3.00 a day in google Adwords.
However, I started building links, and within two weeks, the site's traffic went dead.
My website was penalized by Google Penguin and Panda. I most've done something wrong.

Because of this, I decided to change the site domain name for a new one to recover my traffic, but I left old the old content.

My question is…

Will google see my old content as duplicate content? I paid a writer to help me write that content; therefore, I do not want to throw it away. Will google punish this new domain for duplicate content because I am using my old site content?