Oh, her comb is fine! I have plenty of roosters and this is one of my hen's comb:
View attachment 1147672
Now yes... Sometimes I contemplate if she is a bit- you know-
But she is my best egg layer, sweetest hen and I raised her in my room!!
Now yes, some hens will change sex if they don't have a rooster. Crowing and mating hens... Are normally one of those culprits. A bigger comb doesn't play a part in that though.
As long as your hen acts fine, she looks perfect!
And to your egg question, some hens look egg-bound when they produce an egg. Granite, some hens are... But it's normal at times. My SF hens stands straight up straight down like a penguin... PLOP. There's a pretty lil' egg underneath her.
Good luck, God bless! (Those are beautiful hens too!)
-The Angry Hen