Calcaneal fractures are troublesome because of the prolonged time that is required for their healing and bilateral fractures sure can be frustrating. As per your history, I understand it has been more than 6 weeks since the inception of your treatment. Kindly review with your orthopaedician with a check xray, which will give you a better idea of the healing status. And about itching, it shouldn't be a major concern ....But, still kindly get your skin over the heel area evaluated to rule out any local cause.

Ultrasound therapy will help you to get rid of your pain.... keep your feet in warm water for 20  minutes