Apparently I sleep walk now

So I woke up a couple times this morning, once around 6:00 and again at like 7:50. Both times I rolled over and went back to sleep. I didn't end up getting out of bed until around 9:30. When I woke up, James was already downstairs making coffee and breakfast. He asked me what time I got up...and I told him "Just now." And he said "Really? When did you plug in your hair straightener?" Apparently at some point earlier in the morning (or maybe even in the middle of the night), I woke up and thought I needed to get ready for work, so I went DOWNSTAIRS and plugged in my hair straightener then came back upstairs and went back to bed. I don't remember this at all. Kinda scary. If this sleeping walking thing continues, I might end up burning down the house!