Hi,
Sorry for the issues you are having. I can help troubleshoot this with you.
I visited your site and see what you mean in the checkout.
I see this error in the console:
“NetworkError: 404 Not Found – http://www.healthbloggerscommunity.com/checkout/undefined”
It looks like it could be a conflict or something got changed in the WooCommerce settings.
I found this article that might help out:
https://github.com/woothemes/woocommerce/issues/321
We are limited in support this part of WooCommerce as we do not change or modify the Checkout, but we have our 404 Error Guide and Testing for Conflicts Guide that may help narrow down the cause of this issue for you:
Fixing HTTP 404 errors
Testing Conflicts With Themes and Other Plugins
Let me know what you find out and I can try to help out some more.
Thanks