I wouldn't give up hope on your first broody yet. Eggs are more durable than we give them credit for being. I would hang in there until day 8 and candle. My last broody was a space cadet. She kept rolling eggs out of the nest. 8 of 12 hatched fine. 1 egg was infertile 3 died in shell not from mom rolling them around but because she decided to poop on the whole bunch early on in incubation. It took me three days to bribe her off the nest for the first time. She was a first time broody so I'm cutting her some slack this time as she has been a first class little mom to her her babies-which are now almost 3 weeks old.
I have to agree with poppster and the others who promote isolating the broody in her own pen. It might not eliminate all the problems that can crop up with a broody hen but it can sure limit the number of hassles.
I have the hen who is sitting on the eggs in her hutch mounted on legs inside the chicken house. I have been leaving the door tot he hutch open so she can go get water and food. I could close the door and put feed and water in there with her, but then there is the poop build up problem. Two chickens did go in and lay in her next yesterday.