Did you have any security in place that might now be blocking you? I have had times when I have had to FTP-delete .htaccess and re-begin with a fresh one to get past various re-directs or whatever. Also, I had some uncertainties about the “feel” of my site after doing the 3.5 update, so I disabled all plugins and switched back to a default theme and did the 3.5 update again…then re-activated my Child Theme and found things working more smoothly. I am new at all of this, so you will have to decide…
http://wordpress.org/support/topic/a-question-about-possibly-re-installing?replies=5
@leejosepho: it’s really a good idea to not answer if you’re not sure of the correct answer.
@bcbaseball: see http://make.wordpress.org/core/2012/12/12/php-warning-missing-argument-2-for-wpdb-prepare/ to fix the “Error message: Warning: Missing argument 2 for wpdb::prepare()” errors
Your site is fine, but you may wish to turn off PHP’s display errors setting. Contact your theme or plugin dev so they can fix the underlying issue.