If you don't know how to do so, you can refer to the following guide: How to clean up your Facebook apps. Your best bet is to remove all the Facebook apps you find suspicious. Some of these permissions you can modify, while others you cannot. Every Facebook app has certain permissions to your account. It's possible your Facebook woes are coming from a rogue app that you accidentally installed or were tricked into installing. If this doesn't fix the problem, try the next step. If changing your password fixes your Facebook problems, you should change your password for all your other services too, especially if you use the same password for them as you previously used on Facebook. If you don't know how to do so, you can refer to the following guide: How to change your Facebook password. In this case, you should change your password on Facebook. Their goal was to steal your password and other account credentials, and they may have succeeded.
Someone may have created a fake website that looks like Facebook or another online service you visit and tricked you into logging in. It's possible your Facebook woes are coming from the result of a phishing scam.
