Does this seem unusual?

Avery had the flu...it's never a convenient time, but at 2 in the morning when I just laid my head down 20 minutes before is really not convenient. She threw up from 2 am until 9 am...every 1/2 hour. No exaggeration - really every half hour. I ended up sleeping on her floor (if you can call lying there with your eyes closed for 10 minutes after taking the time to clean up the previous mess and waiting for the next). I slept on her floor because I figured if I was there, I could hear the cough before the throw up and hope to catch it. Well, like clockwork, every half hour was often enough that we got into a good routine...she'd cough, I'd jump and grab the bucket that I conveniently placed at the end of her bed, I'd sit her up and hold her face over it. She'd tell me no, I'm okay, while trying to push it away, and then she'd throw up. Then I'd hold her in the chair for 15 minutes until she'd ask for her bed, to which I gladly put her in so I could clean out the bowl and lay on the floor once again.

Here's the unusual part. I put Avery to bed last night at 9:30. No complaints from her...she asked. She slept so great! My kids are good sleepers anyway, usually sleeping until anywhere from 9:30 am to 11:00 am. This was different though. I had to check on her several times to make sure she was still alive. I don't know about anyone else, but anytime my kids sleep excessively, my mind races that they might not wake up. What is excessive? How about until 3pm...yup, she slept till 3pm today. I checked on her often from about 11 to 2:30 because nobody can sleep that long, can they? 17 hours!!! Each time I saw her she was in a new place in her bed, eyes closed and sound asleep. That must mean she was still breathing. It was the craziest thing...not only that, about 5:30 she asked to go to bed again. I laid her back down and she was out. I don't understand it, oh well. We'll see what tomorrow brings.