Where did all my contacts go?

[AC Question]

I have a Galaxy S5 and all of a sudden yesterday I noticed that 99% of my contacts are gone. If I go to messaging all of my favorites are still showing in the top but only their phone numbers, not the names with the exception of 2 contacts. I am also getting the "unfortunately, contacts has stopped working" message. I have not done anything to the phone that I am aware of. It says I have android version 4.4.4 I also have tried to see if contacts were available in any of my accounts but they are all showing none.

 

[B. Diddy]

Welcome to Android Central! Where were your contacts saved to--your Google account, your Samsung account, or the local Phone account?