My female dog died in a house fire and wonder if she suffered from the carbon monoxide poison?

Sorry that happened, most of the time in a house fire, the Carbon Monoxide will give you a really big buzz, then a bad headache, then you just pass out or go to sleep. So, no, she didn't suffer. The worst case is she got a really bad cough before passing out, and it happens really quick, usually within a couple of minutes.