Hi rjburgess99,
You are likely going to run into many other issues using PreviewDNS and WordPress, because many plugins will incorporate URLs that are not easily replaceable in the database but that you will need to change once the site is on its actual domain. I suggest you do your site development locally, by installing WordPress on your computer. You can find some information on how to do so on the WordPress.org Codex. There are also many tutorials available, if you search for "wordpress localhost windows". You will also want to modify your hosts file to point your domain name to your local installation (note that you'll have to undo your changes if you want to get to your actual live site).
You do need to know that Jetpack won't work on localhost however, so that doesn't solve your original issue. I'm afraid that you also will not be able to get Jetpack running on PreviewDNS, likely because of how GoDaddy configured their servers. For example, in the Jetpack Troubleshooting tips, step #3 says to check your XML-RPC file (which is required by jetpack to run properly). If I check it by going to it on your PreviewDNS site, it doesn't work at all:
http://headforpoints.com.previewdns.com/xlmrpc.php
I'm sorry I can't help you with this any further. Please let me know if I can help you with anything else.