Page Not Found everywhere

Hi guys!

2 days ago I change the permalink in Dashboard. Then my blog went into 404 error.

After that I rename my .htaccess file to .htaccess.bak, and change my permalink to original in wp-option (siteurl & home).

Now, we can go to the website but if you click any link in it, it will bring you to 404 page.

I can login into Dashboash, but I can see text only. Whatever I click on Dashboard will bring me to 404 page.

My website is http://www.mybestdogtraining.com/blog/.

Hope you can help. Thanks!