Sometimes it works to type your password in notepad to see if you're typing the correct password. It's most of the time a good way to find out if your keyboard settings didn't change (like having caps on or a language change caused by a key combination you didn't mean to use).
If you got the right password in notepad you could try copy/paste it from there and see if that works.
If it still fails then try to reset your password in your account info.