HELP! Buff Orpington Being Weird!!

So, in the middle of the day today, I went down to the coop. My beautiful Buff Orpington was in the nesting box, all her feathers standing on end, sitting on two eggs. She made a noise at me when I took them but nothing after that. She is generally a very friendly girl who loves to play outside, but tonight (eight hours later) she was still there, all puffed up, in the same place. She won't really stand up and she let me pick her up. Her vent is not pasted up. I put her on the roost and she stood there but I then had to go inside. I'm really worried because I love my Yolanda! Does anybody have any ideas? Please, I will be devastated if anything happens to her!

 

Thanks so much. I thought she was broody, but she's the first. We don't have a rooster, so she can't hatch them. We already have 20, though I would love some more. Any ideas on how to break her?