Ahhh!

I went through hell in a handbasket with DD and her colic and sleeping issues. Things improved at 9 months and continued to get better until recently, where her sleep has gone completely out the window. E.g. tonight, she went down at 11:30pm, slept for half a hour and now she's up again! What the?! She's been sick recently which seems to have started this but it should be over now. What the heck do I do? Before tonight, she was going to bed at 5 -6am. She was having late naps and I thought that might be causing the problem so today she didn't have an afternoon nap. Seems she decided to nap at 11 o'clock at night instead!!