[Android Central Question]

I have a Galaxy s9 and the google account for the phone is a yahoo email

Today I signed into a friend's gmail account using the gmail app and it has completely messed up my account.

Without ever going to the google setting it logged me into that account - making it so that every contact etc not stored on the device is gone. Even when I try to sign out and back in, it'll allow me to sign in, even get to the welcome "....@yahoo.com" screen and then redirect to have me signed in under her gmail address.

Now even on my laptop - when I go to sign into my google drive or google doc account, it'll allow me to sign in as my yahoo address as I always have but then when I click my profile icon I'm clearly signed in under her email.

I have no idea how to fix this. Since it's also my laptop I'm worried that just resetting my phone won't work as MY email will always redirect to hers.

[B. Diddy]

Welcome to Android Central! Go to Settings>Accounts>Google​. Do you see her Gmail address there? If so, select it and tap Menu>Remove Account. Does that fix things?