What's being 3 months? Do an email password reset straight away and add 2FA. Do you know how you got hacked? Did you get phished. Any account with the same password, change it. Store all passwords in a program like KeePass. Setup 2FA if you have it available and use the mobile app like AUTHY (cause you don't lose ya 2fa codes if you reset ya phone). But like said before. Need more info mate.