Hello!
First of all make a copy of your database FILE when ACCESS is not running.

When an Access database file (mdb or accdb) is corrupt or damaged, then you can try several methods to repair and recover data from it:

First of all, try compact & repair. Follow below STEPS:
For Access 2010, click Compact and Repair Database on the Database Tools ribbon.

For Access 2007, click the Office button (top left), then Manage.

For Access 95 - 2003, choose Database Utilities from the Tools MENU.

Second, if method 1 does not work then try to create a NEW Database and import all the objects from old database into new blank database.

If nothing works, then you may use Access Fix Toolbox
https://www.fixtoolbox.com/accessfix.html
I hope i could help!