Multiple errors after upgrade

I uploaded 3.5.1 and received a fatal error. I deleted everything (but config file) and re-uploaded 3.5. Now it is shooting heading errors and won’t acknowledge my user name or password.

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-login.php on line 362

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-login.php on line 374

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-includes/pluggable.php on line 680

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-includes/pluggable.php on line 681

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-includes/pluggable.php on line 682

Warning: Cannot modify header information – headers already sent by (output started at /home/sheriff/public_html/cms/wp-config.php:3) in /home/sheriff/public_html/cms/wp-includes/pluggable.php on line 881

I don’t do much PHP, but it definitely is my wp-config file. I matched my database info to my server and everything in my config file is correct.

I can’t access anything .

Thanks for your help.

Helen