password issues!

I am so incredibly frustrated. I am trying to reset my phone and turn off everything but it is saying my password is incorrect when I am POSITIVE it is correct. I have reset the password through the computer, through the phone and nothing. I can use the same username and password on this support group and on icloud.com but when I try and confirm the password on my phone to reset it, it says it's wrong. I am at a loss and there is nothing else that I can try or search, so now I am here.