Not sure how to feel on this one

Today was my day to wake up Moose so Wife could exercise this morning. He gave me a big smile when he saw me, and we had our usual morning conversation:

"Good morning, Moose! Now what do you say to me?"
"Say hi Daddy."
"Thank you, Moosey."

And then I realized that he had puked all over the bed. It must have happened hours earlier, since it was dry. Remarkably, he had missed his body, since his PJs were pretty clean. Wife helped me clean up everything while I continued onward with Moose's morning routine.

Moose has learned to stay in bed till we come get him in the morning. Not sure how it happened, but I'm thankful for this, as it's safer to have him staying in one room on the off-chance that Wife and I actually have a chance to sleep in. However, when he's really sick or something's wrong, he doesn't know it's OK to come get us in the middle of the night. I can't have a conversation with him about this, so I'm not sure how to feel. On the one-hand, I feel horrible that he slept in his own Ralph last night. On the other, I'm glad he didn't go roaming around the house in the middle of the night and risk falling down the basement stairs or something awful like that.

But sleeping in your own puke? I mean...look, it's gross. Why didn't he know this? Why wouldn't he get up and at least come into the room and get us?

He has puked two other times today. Obviously he's dealing with a stomach bug of some sort. I'm staying home from work with him. Just now he puked in the family room, and while I was cleaning it up he then proceeded to start eating his peanut butter sandwich. Personally, I can't think of eating anything right after I puke. Wow. So different. And now, of course, he seems to be feeling perfectly fine.