I finally slept! I can't believe it!

Today I am 39 weeks and for the last 2 weeks I have been asleep by 10 pm and up by 2:30 am like clock work. I am talking wide awake until about 5:30am and having to be out of bed by 6:30am. It's been miserable and I have been exhausted. But last night I went to bed at 10 as usual woke up, peed, went to the kitchen to get some water, ( the usual routine) and when I looked at the clock I was in total shock seeing it was 6:30! I expected it to be 2:30 I can't believe I finally slept! Anyone else going through this?