Help, my bird laid an egg?

Okay so my bird, Jane. She laid an infertile egg. And this morning when I came to see her she was nesting over her egg, but she didn't come out of the cage as usual when I open the cage door. So when I checked on her egg it had like brown stuff on it. And yesterday I noticed her anus was like not its natural color and it looked sore. And when I saw the brown stuff on the egg I realized it was blood,so when I checked Jane's butthole it wasn't bleeding but it had blood on it and like some liquid poop in it. TMI? Well any way can anyone explain this?