Was it signs of labor or false alarm?
During the first stage of labor, which lasts up to six hours, she will pants and purr and seeks out her nest. Once she is settled in her nest, leave her alone; disturbing her may stop the labor. The second stage of labor usually lasts only ten to thirty minutes, and rarely longer than ninety minutes. A vaginal discharge signals imminent birth. Involuntary contractions begin, and soon the queen is fully involved and bearing down to deliver. If the first kitten isn’t born within an hour following these strong contractions, take the mother to a vet. Normally, a dark green-gray bubble, which is the placental sac containing the first kitten, begins to emerge from the vagina; it should be fully passed within thirty minutes.