Steps to Take When Your Blog Breaks
Blogs do break or crash, but they can be recovered. Most often, problems involve plugins or updates to your WordPress software — or even updates to your host’s software. Because you cannot get into the code at WordPress.com, the host must resolve crashes there, but see the table in this section for some issues common to both WordPress types.
Remain Calm and Take Notes
Take a deep breath and write down exactly what happened. Note any error message you saw or see, and when possible take screenshots. Try to recall what you did just before everything went wrong.
Turn Off Plugins
Even if you have not altered plugins lately, deactivate all plugins, and see if your blog works. If it does, you may well have a plugin ...