Sleepless nights....what? Great, we're regressing

So, my darling little child decided last night that it would be a great idea to go to bed at 5:30pm and then wake up at 11:30, stay up till 12:45, then again wake up at 4:45am which would ultimately be the time we woke up for good, despite my attempts to put her back to sleep. It was a battle that lasted until about 6:45-7am, so between 4:45 and 7 I got 5 mins of sleep every 15-30 mins. I went to bed last night at 10. I got 5 1/2 hours of sleep, about. I am tired. I almost cried this morning because she wouldn't go back to sleep and it was almost painful to have to get out of bed at 5 am every 5 mins. Here's to hoping tonight is better.