I have been experiencing extremely poor performance when trying to administer my site. At first, many functions were timing out and I would have to retry 3-4 times to get the plug-in page (for example). I upgraded to WP 3.5.2 thinking it would help but, now I can only get to the admin dashboard - no further. Every action I try to take returns a blank page. No error, nothing. The site is still available and performing fine.
I have been trying to resolve this for months. I've tried working with Godaddy and my local service provider but, I think I have narrowed it to a WP Admin issue. I do not have much experience with PHP or WordPress so any help is much appreciated.
The site is: tylerslight.com