Is this normal baby sleep?

Sounds like your little one is on a schedule similar to my son's. He too sleeps about 11- 11 1/2 hours at night and then has two 1 1/2 hour naps during the day. Things could've just been out of whack because her napping schedule was different, but her having trouble last night isn't anything to be concerned about. My little guy is 14 months, and last month he had a few rough weeks in the middle of the night (usually between 1-3am) which was very unlike him. We ended up chalking it up to him getting his molars, which were the first teeth that seemed to give him any trouble. Might she be getting her molars? She could've also just had a nightmare like you mentioned, and just been a bit on edge because of it. I wouldn't be concerned about it though, hopefully tomorrow night goes better!