Last night, Mia became very agitated. She was sitting on my bed and all of a sudden she went rigid and began meowing like she does when she is stuck or scared. She was stareing at the ceeling and would not look away even when we tried to pet her and calm her down. Finally, we made her leave the room and she seemed to calm down. But, in the middle of the night, I heard her crying again and went to get her. She was all stiff again and crying and moaning. What in the world was wrong? What should we have done to comfort her? She did not respond to petting, holding or soothing talking. She is a year old female who is fixed and usually has a quiet personality, though she is very afraid of visitors.