I'm so sorry about Henrietta, that's very sad

I hope Frazzle will be alright.
So this is the second day, still limping, still no eggs. Her poop is bloody but despite all that her appetite is normal, she drinks slightly more than usual but still relatively normal. I brought her inside and soaked her in warm water for about half an hour, still no eggs, and now with every exhale she cringes, probably from pain? She is on my bathroom counter now, wrapped in towels to stay warm after her bath. I've been giving her greek yogurt and bread soaked in vegetable oil so hopefully if it is an egg then maybe it'll pass easier.
She's having a weird "I'm-feeling-better" phase right now (very happily munching away at her yogurt) but she still hasn't laid an egg so I don't know how long it'll last.
My sister pointed out that Frazzle has an odd bump on her hip, on the same side as her limp. I almost wonder if this is a tumor messing up her system? I don't know what else I could do to help her out. Do you maybe think I should keep her isolated? If she's going to die, she might be happier outside with her flock, but I don't know what's best medically for her. Thank you so much for your help!