This checklist is intended to help state agencies deal with cybersecurity incidents. Private citizens will likely find “So You Think You’ve Been Hacked” more useful. Not all cyber incidents result in Data Breach; if a Data Breach is suspected, agencies should also use the “Data Breach Response” checklist.
You're not alone in responding to an incident -- the state has multiple expert resources. Consider the following in reaching out to them:
Here, as elsewhere, bad news does not get better with age, but remember the general rule that the first report is always wrong.