Dashboard login is broken…again…

Hi there,

A few months back I had an issue with my WordPress site (hosted on Bluehost.com) where my wp-admin somehow became corrupted. I had to delete and reinstall my WordPress script, and lost all of my blog posts. It’s happening again today. x(

Attempting to reach greaterthanfangirl.com/wp-admin produces the following errors:

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home2/aubriej1/public_html/greaterthanfangirl/wp-admin/index.php:96) in /home2/aubriej1/public_html/greaterthanfangirl/wp-content/themes/constructor/libs/Constructor/Admin.php on line 38

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home2/aubriej1/public_html/greaterthanfangirl/wp-admin/index.php:96) in /home2/aubriej1/public_html/greaterthanfangirl/wp-content/themes/constructor/libs/Constructor/Admin.php on line 38

Warning: Cannot modify header information - headers already sent by (output started at /home2/aubriej1/public_html/greaterthanfangirl/wp-admin/index.php:96) in /home2/aubriej1/public_html/greaterthanfangirl/wp-content/plugins/wordpress-mobile-pack/plugins/wpmp_switcher/wpmp_switcher.php on line 506

Warning: Cannot modify header information - headers already sent by (output started at /home2/aubriej1/public_html/greaterthanfangirl/wp-admin/index.php:96) in /home2/aubriej1/public_html/greaterthanfangirl/wp-includes/pluggable.php on line 897

Does anyone know how I can handle this without losing all of my information? If this is a simple fix, my apologies; I am a new WordPress user.