Gmail Contacts all deleted
Hello,
I have my contacts synced to across my iPhone and Gmail account. On Thursday I logged out of my iCloud account on my iPhone and used it to log in to my girlfriends account on the same iPhone. I then logged back out of her account and back in to mine. Everything has been fine since with all my contacts being visible, but today I have I have accessed my contacts on my phone to find all my that they have all been deleted. I then logged in to google on a web browser to look at my contacts and try an recover them but they too have all been deleted. Can some help me figure out what has happened? I had hoped that by syncing the contacts across my phone and google account that that might act as a back up, but it seems once all the contacts on my phone were deleted following logging out of my icloud account it has over written all my contacts on on my google account. Why?
Thanks
Matt
iPhone 6, 12