Unable to move character. Can only chat.

This morning I logged into the game and could not move my character. Pressing any of the WASD keys only typed those keys in the chat window. I had not pressed the Enter key. For some reason, to move my character normally, I have to hold down a different key as well as press WASD. Ctrl and Alt both seem to work.

I have checked my keybindings and chat settings and nothing seems to be wrong. I can't seem to exit the chat window and cannot move my character with the normal movement keys. Please help, I'd like to play :(