my domain messed up because of .htaccess

please help me, i played with .htaccess, before, my domain is http://www.goodank.com, now my domain is always redirected to http://www.goodank.com/http%1://www.www.goodank.com/

i've tried to reset the .htaccess file with changing it back to RewriteEngine on

please help me how to fix that thanks.