Hello, the fact she has recently stopped laying maybe in connection with her other symptoms. We would advise you check your hen and the house for signs of red mite. A bad infestation will cause pale comb and wattles and can even lead to death if left untreated. Click here to check out our range of treatments.
If you can see no sign of mites then your bird may be suffering from an infection and our best advice would be take her to your nearest vet. Please let us know how you get on.
Best wishes
Chicken Vet