Clearly, this isn't normal... Im not sure if its gleet, if she has an egg broken inside of her, what the heck is going on, but I feel terrible and I need to fix her because the next option is going to be to cull her.
So it appears now that she has an egg in there. I gave her a 20 minute soak with Epsom salt. Then when I was getting ready to attend to the vent that area was very hard. And when I put my finger into the vent I can feel an egg... I massaged her abdomen a bit, but she seemed uncomfortable
If she is able to poop, then hopefully you have some time.
I would soak for 15 minutes or so then let her rest. She needs to stay hydrated.
Extra Calcium can help with the prolapse and contractions if she has an egg stuck too.
The swelling at the abdomen makes me think she has a reproductive problem too, but that could also be fat, hard to tell.
Let her rest well between soakings so she is not too stressed. She needs to be fairly warm 75F or so.
Hopefully she will pass what's in there. All you can do is continue what you are doing.
I can't stress enough that she needs to be drinking. If you have some Poultry Nutri-Drench or similar vitamins, give her a direct dose at 1 cc per 3 pounds of weight daily for a few days.
For the vent, some of it looks torn as well. The Prep H may help reduce some of the swelling, but that can take time. If she prolapses again and tissue is exposed, it may not go back in immediately. If it doesn't, then keep the tissue moist with you Prep H or you can use an anti-inflammatory cream. Swollen tissue often has to reduce in size in order to go back and stay in.
Keep us posted on her progress.