unable to login with facebook

I have created my account 7 or 8 years ago which I used to log in with Facebook. But recently I am unable to log in with Facebook. I have changed my Facebook email recently. I tried to login with my new email but I'm getting an error and unable to log in. I no longer have access to my previous email. My account is still logged into my phone but I am unable to add email to this account. I tried to log in with a browser but failed. Please help me to recover my account.