Thanks everyone for your helpful and supportive comments. I had my overnight sleep study and found it difficult. The wires, the unfamiliar room, the uncomfortable bed and the anticipatory anxiety made for a strange night of sleep/wake. I tossed and turned and had the sleep tech come in several times to reattach stuff. It did not feel like a normal night, so I hope the data they got is helpful to sort out any sleep issues I have based on the study. When the sleep tech woke me up in the morning, he said, "You moved around a lot last night."