I want to change my password so I know what it is. But I can't because I don't know the current password.
Log out, try to log in. When you enter the wrong password, it will send you to a page where you can choose to have the system email you a new password. Follow the instructions. You will get an email, then click a link, then it will send you a second email. That second email will have your new temp password. Log in with that, and feel free to change it normally at that point. Let us know if you have problems with that.