In Google Webmasters Tools I accidently changed Geotargeting to from No Preference to United States. I realized that was a mistake and changed it back within 2 minutes. Will changes take effect or will it be ignored because I changed switched it back so quickly?I'm freaking out because I hope it doesn't destroy all of the indexing / SEO. Thanks.
Google Webmasters Tools - Accidentally changed something and quickly switched back
google search console;geotargeting
It will be ignored.  Google doesn't respond instantly to changes in GWT...you have to set something and leave it set that way and Google catches up on the next index pass. 