my site does not load

There are plenty more reason to not loading dashboard. Did you edit the theme file or add any plugin just before occurring this problem?

There can be several reasons:
1. Problem with the theme – switch to the Twenty Ten theme. You can do it through FTP, or (if you can not access FTP) you can use the file management application of your hosting.
2. Reset your plugins folder. Pay attention if you have the W3 Total Cache – better to remove it (and all associated files) or just disable it temporary.
3. Enter your CPanel, go to the wp-admin folder and switch the permissions from 644 to 755.
4. Contact your hosting – probably there is some issue with it and thus the site should work again very soon