Website down & Can't Login

Help.

My webpage is http://www.crmsuperhero.com/ and all it says is pageok.

My login is http://crmsuperhero.com/wp-login.php?redirect_to=http%3A%2F%2Fwww.crmsuperhero.com%2Fwp-admin%2F&reauth=1 and it says page not found.

I am fairly new to this but I need to know how to fix this. I have read some other posts and I think it may be caused from the latest upgrade I did which includes some plugins.

Where do I begin?

Thanks,

Ryan