Facebook detected suspicious account activity

Hello,

when i try to sign in i see this message " We've detected suspicious account activity
It looks like your account has been spreading spam due to another person or website gaining access to some of your sensitive account information.

Sometimes this happens when spammers create a fake Page that offers you a great deal (e.g. free flight tickets) in return for a specific piece of information from your account, such as an access token.

We've secured your account and will help clean up any recent account activity that didn't come directly from you. "

then this
" Staying safe on Facebook
Here are a few tips to help you keep your account secure:
Don't click on suspicious links, even if they come from one of your friends
Don’t share sensitive information from your Facebook account with other people or websites "
then and finally this " Sorry, something went wrong.

We're working on getting this fixed as soon as we can.

Go back "
please help me
!