There are a couple of reasons why you might not be able to access your Facebook account even after changing your password. Here are some steps you can try to recover your account:
1. Check for typos: Make sure you're entering the new password correctly. Typos are a common reason for login problems.
2. Log in from a trusted device: If you're using a public computer or a device you don't normally use, Facebook might ask you for additional verification to confirm it's you. Try logging in from your phone, laptop, or tablet where you're already logged in to other accounts.
3. Use recovery options:
Email or phone number: Visit the Facebook account recovery page [Facebook account recovery] and enter the email address or phone number associated with your account. Facebook will send you a code to reset your password.
Trusted Contacts: If you have set up trusted contacts on your Facebook account, they can help you regain access.
4. Report compromised account: If you suspect someone else has accessed your account, you can report it to Facebook as compromised [report compromised Facebook account]. This will help you secure your account and potentially regain access.
5. Facebook Help Center: If none of these options work, you can visit the Facebook Help Center [Facebook Help Center] for more information and support.
Here are some additional things to keep in mind:
Make sure you have a strong and unique password for your Facebook account.
Enable two-factor authentication for added security.
I hope this helps!