Page links problem after change siteurl and wordpressurl

Hi.
I’ve noticed problem after change on site url and wordpress url.
after change from mydomain.com to mydomain.com/start and noticing that didn’t work, I changed it again in wp-config , wp-options and .htaccess.
Unfortunately this operation changed my pages links.
Now i can’t see any of my pages, only wp-admin panel.
Every page have 404 error.
Is there any other file when i need to change url to pages ?
How to fix it?