Patti, if you click "stay logged in forever" when you log in, you more or less never have to enter your password again when you come to the site (unless you clear cookies, I imagine). It's the setting I use for my home computer. So you can be logged in, able to post and have only ever entered your password once, months ago - certainly long enough to have forgotten it!
There is a password retrieval service if you log out and try to log back in; on the login page you'll see the standard "forgot your password?" link you can click, you give it your username or email and your password will be sent to the email account you used to register in the first place. I dunno if the admins can intervene for you if that doesn't work?