Can't access admin login page

Hi

My wordpress site http://www.spinalcordstim.net is working fine until last night when i updated ithemes security and saw a high risk problem(something to do with brute force attacks-i cant remember exactly)…..now every time i go to spinalcordstim.net/wp-admin i get this message

“”””This is somewhat embarrassing, isn’t it?

It seems we can’t find what you’re looking for. Perhaps searching can help.”””””

Im fully updated and just done a backup before making the changes to dropbox

The site is still there which is great but I just want to get to the login page as before…..

In the address bar it just say this now “”http://spinalcordstim.net/not_found”””

Ive searched all morning and im a fairly newb to be honest….the sites been working awesome(almost a year) until i changed some settings on ithemes security last night as i said….

Im with hostgator is that means anything but im not to comfortable with changes there in the admin area there

Ive cleared my firefox cache and tried with other browsers but the problem is still there

Was told to ask my question here as ithemes would have “access to its code”…

Thanks in advance

https://wordpress.org/plugins/better-wp-security/