Weird Chicken..

Hi everyone...I have a very weird chicken. I have had her since the end of June and she had developed this weird fluidy bump on her tummy. She has had it for a long time till present time. She seems fine with it..but I am curious to what this could be?

For a couple of days on and off she hasnt been looking good and today she just pooped out what looked like yoke. She has been standing around for a bit and sitting as if shes trying to push out something, but she has also been on and off being with her other friends. I think she has egg periotisis..what should I do to cure this? I am going to be putting her under warm water to see if that relaxes her..but what if that doesnt work what do I do??

I would love some help..