Lost response details when form is changed

People filled out my form, and then I changed some of the fields, and when I checked the submissions all the data entered in the fields I removed was lost. Is there some way to access that data again? Is it stored somewhere?

You can try reverting your form to a previous version before the field was changed. That should resolve the issue with the lost data entered in the fields. To do so, simply follow this guide: How to View Form Revision History

If you need further assistance, do let us know.