Hello kinberlyfromn ridgeville,
I understand your frustration over losing all your contacts. Were your contacts stored in iCloud or another cloud service such as Google or were they only on your device? I suggest checking settings to see if by chance Contacts is disable for iCloud sync and if it is, try turning it on and seeing if your contacts reappear.
Enable iCloud Contacts
Open Settings
Tap [Your Name]
Tap iCloud
Tap Show All
Enable Contacts
Open your Contacts app or the Phone app to check if your contacts reappear.
Another person seems to have experienced this issue as well so I presume more are experiencing it as well. If your contacts don’t appear, I suggest contacting Apple Support for further assistance and to report it to Apple.
Sincerely,
Captain