Drop in Traffic after site redesign and relaunch?

[Costmo]

I have a site: http://www.kgstiles.com and I relaunched it with a new design a week and a half ago. Google traffic cut in half immediately. The new site is a wordpress site and I have since uploaded all of the old pages and 301 redirected them to the new pages and submitted my sitemap. After google had indexed the whole thing, my traffic was still down. At this point I felt hopeless. I couldn't figure out why traffic was so low. I then realized that the sitemap only contained the new pages, so last night I promptly added the old pages (with redirects) to the sitemap and resubmitted it. Will this help? It's kind of a last resort, because I feel like even if the old pages hadn't been re-indexed, they would still be showing up in search results and when someone clicked on a link to one, it would just redirect them to the new page so does that even matter??

I'm desperate. Any help is appreciated!