Have you massaged her while giving her baths? And lubricated her vent? You could also give her some olive oil soaked bread, not too much. Perhaps that would help from the inside. Give her a high protein diet to make sure she isnt malnurished. The blue comb and skin means blood, or oxygenated...
Is her gut hard (the area that is "bloated")? If so, she could be eggbound. Anouther sign is that she hasnt layed.
If it is -
Give her a warm bath. Not hot, but warm. Massage her abdomen gently so that hopefully, her muscles will relax so she can pass the egg. Be sure to dry her well after...