Just like last night

Woke up at 3, changed her diaper, cried til 4, I finally broke down and fed her...she's still crying and now both Ed and I have evacuated the bedroom.  She shows no signs of this being about teething but just in case I gave her a teething biscuit (that sounds like she's a dog).  It obviously didn't help. I can't find my ear plugs either...great.