You can try forcing your cookies to refresh by clicking F5 when you're on the site, it sounds like your cache has corrupted slightly and is holding an old version of the site from several days ago. If you're not doing so already, remember to close all open instances of your browser when deleting cookies, and then leaving it several seconds before opening it again. Something else to try would be uninstalling/reinstalling your modem or router, these often cause connection problems.
I also recommend using another browser if you don't already, if you download and install Mozilla's Firefox you can use that to see if you can connect to the site.
If none of those options work then I will leave instructions on how to flush your computer's dns cache.