I'm a little confused, if it isn't letting you log in how did you post this thread? If you are speaking in past tense (which you should be if you created this type of thread) then you should make sure you don't have caps lock on at any point when typing in your password. Also, if by any accounts your password was somehow reset--either by accident or intentionally, you can request it sent to you via e-mail and it will send you a/the new one.
Hope that helps. In the future for questions like this just shoot me a PM, I can answer it easily enough.