Boil chicken until thoroughly cooked, cut up and place in a large mixing bowl, set aside. Cook pasta according to package directions, drain and rinse. In a medium mixing bowl, whisk together soups, mushrooms, milk, sour cream, and peas. Combine crackers and butter well. Spread 3/4 of the cracker mixture over the bottom of a 13 x 9" baking dish. Layer chicken, pasta, and spices. Pour soup mixture over pasta layer, sprinkle with reserved cracker mixture. Bake 350 degrees for 30-40 minutes or until thoroughly heated.